They were working on it in 2019 when I left, I thought it was tested in one country after that and then it got shelved. IIRC, it needed a ToS change and there was too much pushback.

I had been voluntold to be on the ads team, because I had sent a list of things that needed to be done to make ads doable and not terrible. Of course, none of my ideas were deemed feasible at the time, including figuring our the ToS stuff, because no use building a product you can't launch and ToS changes aren't easy.