NSA measurement of ss-RSRP, ss-RSRQ in RRC idle mode only?

Hi Experts,
Kindly confirm for NSA do we get measurement of ss-RSRP, ss-RSRQ in RRC idle mode only?
Also SCG addition can be done only through RRC connection reconfiguration and which event it contains?
Thanks.

There’s no 5G idle mode in NSA.

Yes, only this way.

Thanks @RFSpecialist for quick reply.
Will that be B1 event?

Yes, B1 event.