1. Really, which RMM is supported S1200SPS
2. where RMM connector at this MB?
https://www.nix.ru/autocatalog/motherboards_intel/INTEL-DBS1200SPS-RTL-LGA1151-C232-PCI-E-plus-2xGbLAN-SATA-RAID-MicroATX-4DDR4_219613.html Материнская плата Intel S1200SPS - купить, цена, характеристики, отзывы
Hope you are doing fine.
If you take a quick look at the S1200sp technical product specification you will see on page 5 topic 2.2.1 the layouts of each version of boards, the only ones that have available RMM4 and Lite option for KVM are the S1200spo and the S1200spl.
The S1200sps is not RMM4 compatible as you can see in the layouts there is no onboard dedicated RMM4 NIC connector.