That's mainly for visitors. If you're a US resident, you can't just buy medicines abroad, unless of course we are talking about the "they won’t get caught" scenario.
I also wonder if only the "active ingredients" need to be FDA approved, and the packaging is irrelevant?
More over, you can order and ship medicine, including ozempic and zepbound, using American prescription from Canadian online pharmacies. For some drugs it’s quite cheaper than paying American prices.