Now you can force change 5G only network mode. Choose "NR Only" from menu
You can now change the network mode of your mobile manually as you want.
There are many network modes that are hidden by the manufacture.
Such as
NR Only (5G Only)
LTE only (4G Only)
WCDMA only
GSM only ... etc
With this application, now you can access those modes.
What you have to do is only open the app