I think there's too much obsession with this idea of what medical experience is OK for you to have and what isn't
I think in the descriptions of such activities as long as you emphasize working closely under the supervision of a doc or RN, most things should be OK
I did an overseas medical mission and never got flak, I went with a fairly respected group, was closely supervised and didn't do anything too crazy
I also emphasized that part of the mission was language immersion, and that's generally going to be your most respected reason for going abroad anyway
I don't see the difference between an undergrad someone being trained by a capable provider to give vaccines in a developing country where that is legal and a newly minted MS1 doing the same
the only difference is in malpractice coverage and in people's minds where they imagine that the sacredness of the med school gates somehow makes "see one do one teach one" less terrifying than it actually is
I do hope you received good training on how to take a BP properly on whatever equipment you used