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Paxt does not currently have Screen Time access, so it cannot enforce its commitments on this phone. Tap ALLOW SCREEN TIME ACCESS and approve Apple's request. Paxt then checks your commitments and restores the blocks that still apply. A guarded phone also reports the loss of access to its guardian when it can sync.

iOS can retain restrictions after Paxt is deleted. Reinstall Paxt, open it and restore Screen Time access so it can clear leftover restrictions. On a guarded phone, guardian commitments may be restored and continue blocking; ask your guardian to change or remove those. Restrictions from another Screen Time app still apply.

The real key is whoever holds the Screen Time passcode, if you set one up with Make Paxt unbreakable. They can manage those restrictions in iPhone Settings > Screen Time on the blocked phone. On a guarded phone, your guardian can unlock or remove any commitment they set. A hardcore block with neither of those is doing exactly what you asked it to. It opens on schedule.

Check Paxt's iCloud access on both phones. On each phone, open iPhone Settings > [your name] > iCloud > See All > Paxt and make sure it is on. Your name is at the top of the iPhone Settings app. See All is beside Saved to iCloud; some iOS versions call it Show All. Paxt's switch is usually enabled already. Each person should be signed into their own Apple Account used for the pairing. Make sure both phones have internet access, then open Paxt on both and let it sync.

The guardian can sign into Paxt on a replacement phone with the same Apple ID to find the pairing again. Their commitments keep applying in the meantime. If that is not possible, the person who holds the Screen Time passcode can open iPhone Settings > Screen Time on the guarded phone to manage Paxt's access. Removing that access stops Paxt enforcing restrictions on that phone. Deleting or reinstalling the app does not by itself remove the iCloud pairing.

A phone that already guards someone can't be guarded too. Paxt refuses the scan and says so. Pair the person's own phone instead.