There is no requirement for a SIP server to support a RADIUS server. It's a function of the SIP server implementation.
I assume by "SIPS", you mean secure SIP connections to the SIP Server. SIPS is part of the main SIP RFC. Again, a SIP server may/may not support SIPS. Most likely tho, it will support SIPS.
So really what your question should be: Is there a sip server that supports SIPS and RADIUS servers.
Since the Kamailio OpenSER has documentation on TLS support then yes it support SIPS.