IRL Altimeter still uses InHg. FS24 only offered hPa

I completely get why much of the FS community wants to use Metric units of measure, and I have no problem for having that option.
When I got the ATIS information in San Juan, Puerto Rico, I got hPa readings (1013) and the ATC only communicated altimeter readings in hPa. I selected English/SAE units of measure. What’s more, because the 748-8 is underdeveloped in FS24, I could not even select the hPa option as the knob would not turn.