So, I got to step 5. The file downloaded OK. It is in my download folder. Clicking on it gives a message "Do you want to update" and then says it is already updated. The reason for that is in step 4, I was not given any options to uninstall the "Link to Windows" app from my phone. Not sure why. Any suggestions?
This is just my experience: I've got the latest "Link to Windows"/"Link to Windows Service" installed on my Samsung phone, and I'm able to unlock the phone from my PC. As far as I can tell, the problem is completely on the PC side -- in other words, it's not a phone issue, it's a PC issue.
So for me, I'm good to go if I download and install:
phone-link-1-22102-202-0.appxbundle on the PC AND
prevent Microsoft Store auto-updates on the PC side.
No action required on the phone side.
-Steve