Need "Admin Tool online access" enabled — Xfinity app no longer supports Android 11

The Xfinity app recently dropped support for Android 11, which is what my phone runs. I have no other device with the app installed, and I don't want to buy new hardware just to configure my gateway.

I understand from other threads here (and from XfinityGabriel's replies in similar posts) that "Admin Tool online access" under Advanced Settings needs to be toggled on from within the app before 10.0.0.1 becomes reachable in a browser — but I can't reach that toggle without a working app.

Is there any way for a rep to enable Admin Tool online access on my account/gateway from your end, so I can manage my gateway settings (WiFi name/password, connected devices, etc.) directly via browser at 10.0.0.1?

Gateway model: CGM4981COM

Account is in good standing, just need this one toggle flipped remotely if possible.