Record Internal Audio on iPad Pro while listening on Bluetooth Headphones

Hi - I am a student who is enrolled in a Zoom lecture. I watch my lecture on my Macbook Pro. The problem is that I record my lectures on Notability, and due to my class schedule I have to listen to my lectures on headphones as I can't make it home between classes. Notability records the audio that normally would come out of my speakers, so when I'm listening on my headphones, the recording feature is useless. I followed the steps for this solution I found on reddit (https://www.reddit.com/r/ipad/comments/kdcqgp/attn_notability_users_or_people_who_record_zoom/) but I can't seem to get it working - my iPad doesn't recognize the internal audio. I have two of the Sabrent dongles and a TRRS cable.

I also downloaded loopback and would appreciate any help with that as well, as I understand that is an alternative. If someone could offer help on how to configure it so I could also record internal audio from web browsers, not just zoom, that would be great, as I my professor posts youtube videos for us to watch before lecture that I take notes on.

Basically, I need to route audio from my MacBook Pro to my iPad Pro so that it can record in Notability while simultaneously listening to the audio. Any help would be greatly appreciated. Thanks in advance.