Which hold pool were you in? Did you have a job offer or just swimming after successful application?
As far as I know there's still a few members in the Priority Return Pool (redundancies) waiting on a call back - a friend has just received a start date having been let go 3 weeks after starting in March 2020.
After them there is a Priority Hold Pool - these are the ones who had a start date/fleet which was revoked in 2020. They have mentors from BA to keep in touch and be point of contact and active hold pool status to end of 2023.
After that it was just the 'Hold Pool'. One guy I know who was in this has heard nothing like you unfortunately when the updates dried up.
Good luck!