Edge is no longer in the background apps list

Solution 1:

try to disable it by the register editor.

1. run cmd.exe as administrator
2. run regedit
3. find the register path: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\BackgroundAccessApplications
4. you can see key Microsoft.MicrosoftEdge_8wekyb3d8bbwe (or something like this)
5. double click Microsoft.MicrosoftEdge_8wekyb3d8bbwe
6. modify the Disabled to 1, if there is no such setting, just create it to disable it to be as background app.
   Name: Disabled
   Type: REG_DWORD
   Value Data: 1

If there is no Microsoft.MicrosoftEdge_8wekyb3d8bbwe in the BackgroundAccessApplications, create it by right-click the BackgroundAccessApplications and create new Key, they change the key name as Microsoft.MicrosoftEdge_8wekyb3d8bbwe.

In addition, if you also have the setting DisabledByUser, remember modify it as 1, too. If you don't have just modify the Disabled.