What are those questions?
Transfer of data across borders, data regions, that sort of thing. Data that resides in Europe being moved to the US has legal implications - not insurmountable ones, but implications nonetheless.
I'm not a lawyer, I don't even play one on TV, but as someone who
did spend time hosting sites with EU data where some of the hosting folks involved were not based in the EU, this was
interesting. (Especially when part of the hosting arrangement involved Australian sysadmins for 24/7 coverage, and Australia was absolutely not covered by any of the frameworks in force at the time)
Warehousing EU data in a US data centre is more doable since, as I said, the Trans-Atlantic Data Privacy Framework (replaces Privacy Shield, itself replacing Safe Harbour) makes this easier but it's not a magic button - you still can't just give data to whoever might want it even if consent is considerably less required outside of the EU.
At a minimum you have to disclose the change of data controller (something that 'oh hey, I'm your new admin' doesn't really cover) because as a business you're holding EU citizen personal data. The hobby end of it is murky enough but as a business such a thing should be a legal formality to follow.
As with everything, it's about doing your due diligence - being unaware of a legal requirement doesn't make it any less of a requirement. If unsure, consult a lawyer.