open in the Menu bar Assets -> Import Package -> Custom Package...
select the Playtime package
in the "Import unity package" window, make sure all files are selected and press "Import".
4
Locate Files
Unity package is installed! Locate its files in the Playtime folder.
5
Add iOS Configurations
Check the steps in Integrate App Attest. Failure to set up app attest as intended will cause issues with the app set up and may cause the app to be rejected.