Guys, we are using 3CC LTE + 1 NR on commercial network from last 1 year.
It’s all dependent on UE capability as network supports multiple CCs on LTE and NR under EN DC.
Only issue is that NR inter band CA capabilities are not available for mostly LTE 3CCs + NR 1 CC possible.
NR 2CC (n78+n41) + LTE (b1+b3+b20) already tested on CPE pro 2 Huawei.
As most of ENDC handsets are having max capability of 2 Gbps and it can be achieved with only 1NR (100Mhz) +1 LTE(20 mhz) = 1.7 gbps + 400 Mbps.
So ideally, UE vendor doesn’t need more CA combinations.