Frage zu Quectel RM500U-CNV

[Uwe at Moosheimer.com]

Dear Community,
I'm not sure if this is the right place to ask my question. If this is
not the case, then I apologize and ask for a hint where I can ask it.

I am using the Banana R4 with OpenWRT 24.10.0 r28427-6df0e3d02a / LuCI
openwrt-24.10 branch 25.076.76243~9c000ff.

Two weeks ago I bought and installed the Quectel RM500U-CNV. Everything
worked fine and the modem is recognized and addressed via MBIM.
But unfortunately the ModemManager always says:

'Cannot change modes: only one combination supported'

In the last few days I have read several times that the Quectel
RM500U-CNV is probably not supported by ModemManager.
Is this correct?
And if so, will this change in the foreseeable future?
And if not, can anyone give me a beginner's hint on how to get the modem
to work or whether I need to buy another one?

- Uwe