Don’t have to launch in Europe . Payments aren’t like other SaaS apps launching in every country is lot of paperwork and apps will choose to work in only some geographies .

Also WhatsApp does integrate payments in some geographies so it is not like FB wasn’t already having a step there .

FB is just chasing fads, few years back it was libre coin at the peak of crypto interest . They will keep throwing stuff to see what sticks until they run out of money