Adafruit had pi 5's in stock a couple weeks ago and they didn't sell out instantly. I could have ordered but decided I didn't have an immediate use for it, so it could wait.
Pi Zero 2's as of the same time were fairly easy to find. I don't know about now. Those had been extremely scarce for a while.
Pi 4's are now plentiful. But, Pi 400's (4 with a keyboard more or less) have been fairly easy to get all along.