SQ MixPad PFL-switches should work

It would be very good if I could activate the Pfl keys in SQMixpad. I sometimes work with the iPad from the audience.
Then I could click the Pfl key for some channel or mixes and connect a Bluetooth transmitter to the headphone output of the SQ.
With this I could listen to all channels and mixes in the audience with the Bluetooth receiver and a headphone.

Have you looked at the third party app, Mixing Station? I know on the Avantis and DLive, you have “solo” functionality available on the app. I don’t know if the SQ has a different limitation that would prevent it from working however.

I personally use a spare IEM transmitter and bodypack for PAFL at the church I attend because the console itself is located in a balcony outside of the speaker’s coverage area. I’d rather sit in the congregation and hear direct sound from the speakers vs sitting at the balcony and only hearing sounds that are reflected before they get to that location.

@ Pittie
To be honest, I don’t really understand what you mean.
My MixPad has a PAFL button under each channel- or mix-fader and, at least for me, they work exactly in sync with the connected SQ.

I can confirm this works for me, too.
I use this regularly in theater applications with a notebook and a wired headphone amp to check wireless mics backstage.

When doing the patch to your bluetooth transmitter, note the difference between PAFL and Listen bus (See I/O → Monitor out):
The Listen bus has a “soft” volume control (In Mixpad: Setup/Audio/Listen Level) so you can also control the volume
remotely.
On SQ6/7 you can also assign the listen level to a soft rotary.

Unfortunately, I don’t currently see any way to control Soft Rotaries from the Mixpad.
But if you use on a MixPad the listen bus for PAFL, you can there also assign for it the Role of the Master Fader Mode “Listen Level”.
In this mode, you can also conveniently adjust the level of your listen bus from the MixPad using the master fader without having to go into the audio setup first.