Chateau 5G only LTE and no 5G

Hi@all,
I am a newbie to MikroTik devices and general LTE/5G.
I have set up Chateau 5G and IP passthrough for LTE1 to my main router without any problems and the LTE connection is stable. I am struggeling with 5G. I am not able to get a 5G connection. My operator Vodafone DE offers 5G and field test on my iPhone 13 pro max shows 5G NSA Band 20@10MHz.
I get a lot of other readings but I am not sure which information is necessary for you to help.
RouterOS is 7.1.2 and modem firmware RG502QEAAAR11A06M4G.
A connection is established with data class LTE on B28@10Mhz earfcn: 9460 phy-cellid: 151
What am I missing? I thought 5G does not require additional setup.
Assistance is greatly appreciated.
THX in advance.
Tobias