Catherine reformed Russia's financial system by modernizing tax collection methods and implementing fiscal policies to stabilize the economy.
There was some improvements but the process of changes kept going on during the reign of PI and after his death. Economy was not “stabilized”: CII was the first Russian monarch who accumulated a huge foreign debt and unrestricted emission of paper money resulted in their devaluation. Paul I had to take drastic measures to deal with this problem. As far as the fiscal policies were involved, Vyazemsky did a lot in that direction but effect was more than “balanced” by the endemic corruption, especially on the top level. Potemkin’s mismanagement of the state funds was notorious and CII ordered just to “write off” few disappearing millions for which he had absolutely no account. There were more backed up by a very flimsy documentation that was accepted. Alexey Orlov also could not account for millions after the 1st Archipelago Expedition. Add insane expenses on the favorites, huge grants of the state lands and peasants, etc.
She also established the first Russian public bank.
First “public” bank was open in 1754 by Elizabeth. Catherine just increased its capital. And the bank was for nobility. It was called Nobility loan bank and it was given the loans secured by the estates or valuables. The first commercial bank opened in 1818.
Catherine introduced new military technologies and weapons, including artillery improvements and the adoption of more advanced firearms.
Artillery reform had been done by Shuvalov during the reign of Elizabeth when the very good field howitzer was introduced. What new artillery types were introduced during the reign of CII? If anything, there were complaints about Paul inheriting artillery on the obsolete carriages.
Which “advanced firearms” are you talking about? Most of the infantry remained armed with the same flintlock muskets.
She also invested in the development of the Russian navy, expanding its fleet.
Now, this is true. Of course, a cynic may remark that the ships of the newly created Black Sea fleet had been slower than their Ottoman opponents and the victories had been won due to the skill of the leaders and crews, not quality of the ships. As far as the Baltic fleet is involved, during the 1st Archipelago Expedition some of the assigned ships did not manage to get out of the Baltic Sea, quite a few required significant repairs when they reached Britain and at least one had to be sold for wood and replaced by a purchased one.
The extraction of valuable minerals like iron, copper, and precious metals like gold and silver increased under CII.
They kept increasing from reign to reign but CII’s time did not see noticeable technological innovations. To be fair, in the 1770s on Nerchinsk plant
some of the bellows had been switched from manually- to horse-powered.
CII promoted the use of combined arms tactics, integrating infantry, cavalry, and artillery in coordinated military operations, allowing for greater flexibility and effectiveness on the battlefield.
First, there was little new in this, the warfare was progressing with the time, and second Catherine had absolutely nothing to do with the military innovations or their “promotion”. Rumyantsev was never in charge of the Russian military and later was simply pushed aside, Dolgorukov-Crymsky did not make it into a fieldmarshal, Peter Panin, who presumably introduced the jager units, was kept out of any military business between taking Bendery and Pugachev Uprising, Suvorov had glory but very little of an influence and never even held an independent army command, Potemkin did some reasonable improvements in uniforms, which were abandoned and had no influence and definitely had nothing to do with either tactics or strategy, being pathetic in both areas.
CII incentivized entrepreneurs to invest in,
And failed: entrepreneurship in industry needed labor and CII did everything in her power to deny it to the merchant class. By the end of CII reign Russian Russian merchants still did not have credit institutions which was a serious handicap in domestic trade and a killer of the international trade.
and encouraged the immigration of skilled workers and entrepreneurs from Western Europe to contribute their expertise to Russia's textile manufacturing with tax breaks, subsidies, and grants, which ended up creating new factories and the expansion of existing ones.
Started during the reign of PI and never stopped.
She also invited foreign metallurgists and engineers, particularly from Western Europe, to Russia to introduce advanced smelting and refining techniques, established technical schools and training programs to educate Russian metallurgists and workers in modern techniques.
First, invitation of the big numbers of foreign specialists started during the reign of Tsar Alexey, if not earlier, and never stopped since then. Second, metallurgic industry was well-developed before Catherine: even in the 1710s Nevyansky Plant had the biggest furnace in the world, Nerchinsk Silver Plant existed since 1704 and in 1745 Berg Collegium contracted Saxon specialists for its modernization.
Some of these new techniques were: the Bessemer Process, Coke smelting, cupellation and electrolysis.
No offense but this is a pure nonsense: Bessemer took patent on his process in 1856 and in Russia it was first time implemented in 1866. What this has to do with Catherine? Russian metallurgy was using charcoal all the way to the post-NI reign.