pmbootstrap got some big refactoring today to it's "apk" handling.
It will now always run apk on the host (no more slow apk through QEMU!) and should do a slightly better job at caching packages.
https://gitlab.postmarketos.org/postmarketOS/pmbootstrap/-/merge_requests/2463
This should make some things like building packages go faster!
If you're already running pmbootstrap 3.0 alpha you can "git pull" and give it a whirl.