I'd get a new lawyer immediately. Precision is important in legal matters, and this lawyer is throwing around the terms "enemy country" and "Allied countries' in a way that makes clear that he doesn't know anything about the legal meaning of the terms..... The first question the lawyer would ask about the planned acquisition of product containing components from Russia and Belarus would be whether you have an alternate source known to come from Allied countries, as opposed to what are currently "enemy" countries? Because proceeding down this path could cost a lot of money and ultimately the answer could be that it is prohibited. Its not as if there is a special price incentive or other good business reason to deal with parts from Russian suppliers.
Again, this isn't an academic discussion. People's livelihoods are at stake. It isn't helpful to put out clouds of baseless "information."
Individual Americans who comply with existing Customs requirements should be fine, IMO. If worried, get an opinion from a qualified lawyer who knows about US import law.