Drei APNs seems missing from our settings

• /e/ version: 0.15
• Device model(s): OnePlus 7Pro

Summary

APN settings for carrier "3" aka Drei in Austria seem to be inaccessible from the ROM according to this thread https://community.e.foundation/t/problems-with-sim-card-on-oneplus-7-pro-and-e-os/29254

APN settings for Drei can be found here: https://www.apnsettings.org/eu/at/drei-osterreich

The problem

Steps to reproduce

What is the current behavior?

What is the expected correct behavior?

Technical informations

Relevant logs (adb logcat)

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Solutions

Workaround

Possible fixes