Yes. In the Windows 11 supported Intel processor list, "Xeon Scalable Processors" is listed separately from "2nd Generation Xeon Scalable Processors" and "3rd Generation Xeon Scalable Processors", which indicates it refers to the original Xeon Scalable line.
Based on that list, Intel Xeon Silver 4112 falls under Xeon Scalable Processors, so it is supported for Windows 11.
The documentation also states that the listed processors meet the minimum floor for supported processor generations and that OEMs may use those CPUs for new Windows 11 devices. It also notes that hardware vendors should be contacted for specific support details.