If FFP2 masks being mandatory stops anyone booking its pretty pathetic.
It's not pathetic. They're darned uncomfortable and of questionable efficacy. If I'm travelling for
pleasure then they negate the whole point of the trip. I want a vacation, not an ordeal. It's my money. I'm not spending it to re-enter covidworld. I'm not alone in thinking this way. I'll choose destinations where mindless mandates of this sort do not apply. If you're fine with them, make your bookings accordingly. But the potential market size is reduced substantially by measures such as this. This is why German carriers are distraught about this development.
If planning for a (hopefully) undisrupted leisure trip, it is also worth keeping in mind that governments which impose bemuzzlement are simultaneously the most likely to reimpose testing requirements at short notice. So Germany bookings are a NO from me TFN.