Unable to remove devices from FindMy

There's a iMac I used in my previous company.

I logged out my account and removed it from my iCloud after I left that company.

Strange thing is, I can still see it in my FindMy and there's no Remove This Device option for this iMac while my other devices do have this option.

I'm sure this iMac isn't in my iCloud right now:

How can I remove it? It's a bit annoying to see those devices in my account that aren't mine...