The open-source firmware op24/25 for Flint 2/Beryl AX need to take some times, R&D run into a few issues and they are scheduling resources and investigation to troubleshoot them.
Confirm that this issue still occurs in v4.8.4, since the front-end update is not merged in this version; and it will be merged in v4.8.5 (or the next release) to fix this issue.
The drop-in gateway function is available and works fine. If the IP cannot be obtained, you can also fill it in manually.
good news
Flint2 as AWG2.0 is running with 2 Iphones, Beryl MT-3000 and Slate 1800AXT
( i tested both IOS: AmneziaWG + AmneziaVPN both work now)
Main-Issue was spaces between the Line in the H-Parameters
Hint1:
The confs from the QR-scans are refused in the IOS-APPs. Edit manually the spaces away between the H1 = xxxxx-xxxxx
and use the correct I1-Parameters: