I’ve been a CMMI Lead Appraiser for over twelve years, have done hundreds of appraisals, and work closely with government agencies and contractors.
I have never seen an RFP or solicitation that differentiated between CMMI -DEV and CMMI-SVC. Most that I have seen use outdated information, refer to older, sunset versions of CMMI, and don’t even seem to know the SEI spun the CMMI out to another company in 2013.
It all seems like boilerplate. That said, most of the solicitations that require CMMI are for technology-oriented (primary SW) companies, not services companies.