SIM APN settings greyed out & eSIM APNs says 'Access Point Names settings are not available for this user'

There are unanswered questions in the forum about eSIM but many do resolve.

Speculative the eSIM may rely on Google helpers not available to AOSP. Maybe the eSIM encounters “security issues” … therefore perhaps related

Edit from your link and you need to reboot the phone, while connected to the WiFi Network.

I will follow up when I read the article more fully. APN changes for 2026 probably force more emphasis on IMS registration. [1]

From your screenshot is not “Chose network” option not opened by untoggle Automatic?

[1] How to check for successful IMS registration Wifi calling not working, e OS 3.5 on FP6 - #3 by tcecyk

Adding also hashtag esim