The policies that will have the biggest impact on supply (at first) and price (once supply chains are reestablished like they are for any illegal substance where money can be made) are bi-partisan and Biden has made it clear getting control over small packs in the mail is a top priority.
Effectiveness of these methods remains to be seen, but plenty of countries are "no-reship" for good reason, it's not impossible.
To be clear, whatever you want will be available again at some point, the question is how much, and will the selection and quality be as good. It wasn't 20+ years ago before UGL vendors could just mail stuff and be 99% certain it would slip through.
AAS aren't the target, but you can't stop this from coming in a small box mailed from China
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without also stopping AAS as a "bycatch".