Chateau 5G: unexpected request for APN/DNN=ims

Hi.

When a Chateau 5G attach on 4G/5G network, apart the default APN/DNN (e.g., APN/DNN=internet), it also request for APN/DNN=ims.

How to disable it? Why it is requesting for this APN/DNN?

Br. Stefano