Well, looks like I guessed correctly.
You do not need anything beyond free tier, to simply point your domain (via DNS) to bplaced.
Simply create a
CNAME and map your domain to your bplaced domain.
All thats left for u to do, is simply add your domain via bplaced portal-thingy at https://my.bplaced.net/domains
It really is a shame that the translation still isn’t finished (it’s almost been a year) so you either have to deal with deepl/gtranslate or take guesses.