yeah this is the circle of ownership because the only way to get your account back at this point is social engineering, which is a serious topic about getting accounts hacked which different companies will handle seriously, as it requires a level of “trust me bro” on identity, If possible, id try to look for a CS that will take receipts of the game purchases to help further prove your identity.
in a comment that was removed from the post, this data was in a decompilaion of steamvr binaries. which implies potentially vr related
i dont know source though. take with grain of salt
https://i.imgur.com/z9Bq2hb.png