user539 Playstore message is "Not availabe for this device..."
The users who get this message with PayPal and Revolut, which versions of Play Store and Play services do you have installed?
Can check this by going to App Store > Google Play services/Store > Settings > scroll all the way down
user had the same problem trying to install Yuka app in private space
Same on my Pixel 8 for this app. I think this app is definitely using Play Integrity to disallow installs on alternate OSs. Not sure about PayPal and Revolut…