Hi @Maria,
Recently there has been a change in the sample Powerapps (Inspection included) in Teams, these apps now are open-source.
Please refer to the following screenshot for more detailed information:
To install the Inspection app, please follow the steps in this Github link:
https://github.com/microsoft/teams-powerapps-app-templates/blob/main/INSTALLATION.md
In short you may need to manually download the app package and upload it to Teams.
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