“If fiscal expenses remain at their January levels throughout the remainder of the year, the NWF reserves could vanish in just three months. And even if they don’t — as is more likely — 2025 is probably the last year Moscow will be able to fully cover its fiscal deficit by tapping into those savings.”
https://www.census.gov/foreign-trade/balance/c4621.html
The US traded with Russia for about 15-30 Billion $ RU -> US and a trade deficit for the US of about 6-20 Billion $ . With the sanctions it is down by about 90%
The direct sanctions are not that significant. I think the biggest impact of US sanctions is in the financial sector. I am unsure if the EU could maintain these, if the US wants to reallow all the Russian banks into the system, or if the EU and US go head to head about it, risking to blow up the global financial system. However i think this could be something where the EU stomping its feet could get Trump to comply, as his billionaire friends won’t be happy about being cut off from their foreign assets.