If a UE doesn't support DSS in NSA mode won't it support in SA mode also?

Hi All,
If a UE doesn’t support DSS in NSA mode won’t it support DSS in SA mode also?

Yes. DSS capability mainly include rateMatching capability around LTE CRS and mainly others.
If UE doesn’t support in NSA so it won’t support in SA also.

Why UE needs to support DSS in SA mode?
If a UE is SA only, it wouldn’t know about LTE Frames?