CSI-RSRP is used only to RRC_Connected and SS-RSRP is used to RRC_Connected or RRC_Idle.
Am I correct?
There is no RRC Idle for 5G in NSA.
Only connected mode in 5G.
In NSA i.e. EN-DC.
SSB-RSRP is used for B1 measurements to trigger SCG addition.
Yes for SA.
For NSA, SS is used before SCG addirion, while both SS and CSI-RS could be used after SCG addition