Answer:
Launch iCloud.com in the web browser on your PC.
After the page opens, enter the credentials; username and password.
On the screen, after you login, you’ll see all iDevices you’ve associated...
Choose "Erase operation" for devices you can’t log inside.
or
Connect your iPhone to a computer. If your iPhone gets hung up on the Apple logo or a solid-color screen when forcing it to restart, you can try using your PC or Mac to repair it without losing data. Start by connecting the iPhone to the computer using its charging cable.
2
Open Finder (Mac) or iTunes (PC). If you're using Mac Catalina or later, click the two-toned face on the Dock to launch Finder. If you have Windows or an earlier version of macOS, open iTunes from the Start menu or Applications folder. Locate your iPhone. If you're using Finder, click your iPhone's name in the left panel under "Locations." If you're using iTunes, click the button with an iPhone icon near the top-left corner of the app (to the right of the drop-down menu)
Explanation:
