Lost Access to their Gmail account

Even if you set things up with his permission (and even if NextDNS is only doing DNS filtering), Google treats a supervised account differently. Adding it to a second device (your Pixel) requires the supervisor’s approval and the supervised account’s consent process. Motorola + Pixel + Google Fi doesn’t change the Google account rules.

Quick things to try first

1. Have him approve the sign-in from his phone
   • On your Pixel: Settings → Passwords & accounts (or Accounts) → Add account → Google.
   • Enter his email + password.
   • It should prompt for parent/supervisor approval.
   • On his Motorola, open the Family Link app (or check the notification / email from Google) and approve the new device.
   • Both of you need to be nearby / online at the same time for the approval flow.
2. Check the Family Link status
   • Open Family Link on the supervising account (probably yours or whoever set the blocks).
   • Select his profile → Controls / Signed-in devices.
   • Look for any pending device requests or restrictions on adding accounts.
   • Also check whether “Add/Remove user” or device management options are locked.
3. Workaround while you fix it (important for medical access)
   • Open Chrome (or any browser) on your Pixel → go to gmail.com → sign in with his account.
   • You can also install the Gmail app and try adding the account there; sometimes the app flow is less strict than system Settings.
   • For ongoing medical stuff, consider having him set up email forwarding of important medical messages to your address, or share a Google Drive folder / Calendar with the relevant documents. This avoids full account addition if the blocks stay.

If the above fails

• Temporarily stop supervision (only if he is an adult and you both agree the blocks can be removed or reapplied differently):
  Family Link app → his profile → Account info / Manage settings → Stop supervision.
  Confirm on both sides. After that, the account should add to your phone like a normal Google account. You can re-apply content filters later via NextDNS, Digital Wellbeing, or a different method if needed.
• Clear Google-related caches on both phones:
  Settings → Apps → Google Play Services → Storage → Clear cache (and if needed Clear data).
  Do the same for the Gmail and Family Link apps. Restart both phones and try adding the account again.
• Make sure both phones are updated, Google Play Services is current, and you’re not on a restricted network/VPN that interferes with Google’s authentication.

NextDNS angle

NextDNS itself usually doesn’t produce a “parental control / permission” message for Google account addition—that wording is almost always Family Link or Android’s System Parental Controls. If NextDNS is blocking Google domains or authentication endpoints, temporarily disable NextDNS (or whitelist accounts.google.com, gmail.com, play.google.com, etc.) on both phones while you add the account, then re-enable.

If none of this works, the cleanest path is to contact Google Family Link support directly (from the Family Link app → Help & feedback → Contact us, or support.google.com/families). They can see the supervision state on the account.

Sorry you’re dealing with this while your brain is fried—medical access should not be this annoying. Start with the approval flow on both phones together; that fixes it for most people in this exact situation. Let me know what the exact error text is if it still blocks and we can narrow it further.