Previous MacBook setups linked to A.ID ?

Hi

so since my purchase of my MacBook Air a few months ago I have learned a fair bit about partitioning the disks and how to reformat and recover data, purely out of curiosity ( not the best way to learn). In that process my MacBook was obviously reset a handful of times and was essentially started from a bare disk.

now my problem is that these old versions of my MacBook still exist on my Apple ID somehow or another, and I’d like very much to get rid of them.I only know of them because my phone still gives the option to forward calls and texts to all of them when near by , and when I sign out of iCloud and return to sign back in I’m asked for the old password I used to log in previously ( nuisance but I’m sure that’s standard ). There’s no trace of them in logged in devices or findmy or iCloud as far as I can tell.

so how do I get rid of these access versions of my MacBook that no longer exist ?