Time to revive my account... (scrobbling since 2003, heh) - started in audioscrobbler days, before last.fm
My usage has gone way down since switching to streaming services, this made me search for ways to backfill the data...
For anyone using Apple Music, looks like you can request an export of your data from privacy.apple.com, then use https://github.com/nerveband/Apple-Music-Play-History-Conver... to convert it for Last.fm import (haven't tried it yet, but looks promising).