Standalone - DSS:
UE is not sending ratematchinglte-crs IE.
Does that mean DSS not supported by UE?
Indicates whether the UE supports receiving PDSCH with resource mapping that excludes the REs determined by the higher layer configuration LTE-carrier configuring common RS, as specified in TS 38.214 .
ETSI TS 138 306
5G; NR; User Equipment (UE) radio access capabilities
(3GPP TS 38.306 version 15.5.0 Release 15)
I would guess that UE not supporting DSS should not camp on SA-DSS cell. DSS capability is in SIB 1