I have the same boost on APR st.1+, about 1,45 bar.car is 2017 Boxster S PDK with APR 93 tune.
I plugged in a cheap obd2 scan tool and did some pulls MAP sensor ready 74" hg this comes out to about 21.5 PSI !! unfortunately my dash will only read up to 16 PSI but now I know for sure that I got a bunch of boost from the tune. I did before and after dyno runs but it was on a 95 deg day and the IAT was so high it was pulling back the power while on the dyno.