Hi @BJ
There are two RTA’s in the SQ, the one in the Meters screen and one for channels (PEQ/GEQ).
You can find more info on how to switch it on and adjust settings in the reference guide here – https://www.allen-heath.com/media/SQ_ReferenceGuide_V1_5_0.pdf#page=46&zoom=auto,-361,574
MixPad functionality is the same and buttons are in the same place, the only thing you may have missed is that you can drag the centre bar on the app (with the meters) up or down to either get bigger faders and pan control or full processing control – including access to the RTA.
Hope this helps!
Keith.