Changing VO Audio distination to use Ipad in a concert, can i?

Hello all:
AM thinking of using my Ipad or Iphone to streme some music my giggs.
i am using mac now to do this, because i can change the Voice over audio output to be in my Hearing aids.
, but now even the audio distination feature is in my VO router, still can not change the VOice over AUdio output.
I connected my Ipad to an external 3.5 Jack, and My hearing aids or any other Bluetooth Headset, and same result, Voice over always go with THe main outpu.
SO, is there a solution please?
Using Ipad mini 4 here, or Iphone 13 pro max.
Thanks in advance