Check and clean your clipboard using service widget shortcut and quick setting tile.

Source Code: https://github.com/DeweyReed/ClipboardCleaner

Possible reasons for the app failure
1. From Android 10(Q) Non-input-method apps can't get modify and listen to the clipboard in the background. Although this app tries its best it still may fail and the listening to clipboard changes is unavailable for now. Please test the app yourself before use.
2. If you see multiple clips or clip history it means something like the keyboard app stores them. In this case this app fails.