Hi and thanks for reaching out. My name is Bernard a Windows fan like you. I'll be happy to help you out today.
I understand the issue you have, nothing to worry I am here to help, I know some of these steps are already done, you have just skipped it if you think it will have the same result.
Method 1. Repair Windows Scan app
Go to Settings> Apps> Apps and Features
Look for the Windows Scan app then click Advanced options
Click Terminate then click Repair then click Reset
Restart the PC and check again.
Method 2. Reinstall the Windows Scan app
Go to Settings> Apps> Apps and Features
Look for the Windows Scan app then Click uninstall
Then kindly reinstall from here: https://www.microsoft.com/en-us/p/windows-scan/...
Method 3. Use Windows Fax and Scan instead
Press Windows key + R then type in:
wfs
Then hit OK and try to scan from that.
Let me know how does it go and I hope that helps.
Bernard
Independent Advisor