DUT adding SCG (B4 + N78)

5G NR
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5G NR Issue with DUT (Device Under Test)

Device has not reported any ENDC combination in the UE capability information as band filter not included by the network in UE capability enquiry.

The issue is as DUT has not reported any ENDC combination but network is adding SCG with N78.
UE initially camped on Band 4 LTE and adding SCG with N78.

There is no ENDC combination B4+ N78 reported by the device , only this combination supported from the RF side.

How is DUT adding the SCG successfully?