Remove device no longer associated to Apple ID

See the article https://support.apple.com/en-in/HT205064

If you're using iOS 10.3 or later, you can remove devices from your iPhone, iPad, or iPod touch:

1. Tap the device to see its details, then tap Remove From Account.
2. Review the message that appears, then tap again to confirm that you want to remove the device.
3. If you're still signed in with your Apple ID on the device, it might reappear on your account page the next time your device connects to the Internet. To permanently remove the device from your account page, sign out of iCloud, iTunes, iMessage, FaceTime, and Game Center, or erase the device.

See this article also https://support.apple.com/en-in/HT204074

https://support.apple.com/en-in/guide/icloud/mmfc0eeddd/1.0/icloud/1.0#mm8d6ca7dc47

Hi there, syed.ishtiaq!

Thanks for reaching out to the Apple Support Communities! It sounds like you're seeing devices associated with your Apple ID that should not be there and are not being removed. I would recommend reaching out to Apple directly by checking out this link to Contact Support and they will be more than happy to proceed with additional steps.

Have a great day!