LinkedIn was doing this to me, too. But then I randomly was able to log on again. I wasn’t able to for months and thought it was ridiculous that they were asking for my ID.
You can try logging in on an IP address you previously logged in on. Then, delete your account ofc.
I use /e/OS instead of Lineage now. It comes with MicroG and everything just works. I have a personal profile and a work profile. I keep them separate. No issues at all.