H.264 not showing as encode option

[foodtech]

Been moving cameras around and just noticed that my IPC-HDW2231RP-ZS cameras are showing H.264H and H.265 as the only Encode Mode options, no H.264. Is this correct or is something preventing H.264 from being an option?

System version: 2.622.0000000.31.R, build date 2018-08-13
WEB Version: V3.2.1.616707
ONVIF Version: 16.12(V2.4.3.574996)

Thanks.