Re: Administer all SharePoint List customized Powerapps in tenant
Hi @Anonymous ,
Please refer to Power Apps for Admins Connector where you can manage all the apps in default environment, including those integrated in SharePoint.
For instance, the following code returns all customized form in Default environment since all custom forms display name pattern are 'ListName on SiteName forms' by default.
Filter(PowerAppsforAdmins.GetAdminApps("Default Environment ID").value, "on" in properties.displayName && "forms" in properties.displayName)

Hope this helps.
Sik