Replaced headunit in 2019 JBL - lack of volume

I replaced the headunit in my 2019 Limited Crewmax with the JBL System. I put in a

$599 Pioneer AVH-W4400NEX In Dash Multimedia Receiver with 7" WVGA Clear Resistive Touchscreen Display

Pioneer AVH-W4400NEX and an iDataLink Maestro (Thanks to everyone who posted on here with their setups - it helped a lot to figure that out. Also got the Scoshe dash kit). I have a few things not working right, such as not seeing the parking sensors or climate control - I am assuming that is because they have not updated the firmware for the 2019 yet. The one thing I am not sure about is why the volume does not get quite as loud as I would expect. It gets somewhat reasonable when turned up all of the way, but not quite to the level I would expect. Is that a normal issue? Could it be due to needing updated firmware on the Maestro? Is there an adjustment possible on the JBL amp?

Thanks!
(sorry for the dark pic - I'll take one during the day next time)