Not to discourage usage of OSM at all, but you can absolutely download offline maps on mobile with Google Maps, they’ve just hidden it a bit. If you tap your account icon in the upper right, a menu pops up that includes offline maps, and it’ll let you select boundaries to download.
They’ve actually slightly improved this lately, they ask about what they determine are risky sexual behaviors (ie hookups) with no gender attached now. The one thing is that you can’t be actively taking PrEP and donate because it would obscure the HIV testing results (that they ought to be doing every time, multiple times!).
Source: https://www.redcrossblood.org/donate-blood/how-to-donate/eligibility-requirements/lgbtq-donors.html