Sort of, yeah. My personal laptop is an M1 MBP, so I can run the iOS version of Otter on it, have the system default audio point to LoopBack with the headphone jack as a monitor (which goes to a device that streams to my hearing aid). Then in my video conference software I set up the system default audio as the sound output and my Logitech C920 webcam as the microphone input. Conference software gets what I'm saying, Otter gets what everyone else is saying, I get captions.
Work is a Windows laptop; I could (and do, on my personal Windows desktop) use VoiceMeeter to accomplish the same general approach as described above. But rather than have my security team at work asking me annoying questions, it's easier to run Otter on my iPad and use a TRS-to-TRRS patch cable (I use the Movo CFP-1 from Amazon) to feed that into my iPad... plus using my iPad to display the captions frees up my displays for meeting-related things.
In pre-pandemic times I would also use it for some meetings at work, and meetups.
I think Otter has a fairly significant user base of people using it for accessibility and not just meeting notes, and is seemingly aware of it because they've added features geared to that use case, like the full screen text option with adjustable font sizes.