Wow! Congrats with the launch!
I used the web app several times for working needs, found it really helping during strict quarantine time. We had several internal company events hosted with be.live to our company's internal FB group and overall experience was nice! Especially quality of a stream – we've managed to stream a presentation with video and Facebook Live was okay with that, no lags and sound delays (tried to setup OBS for this need before – got stuck quite fast).
Already tried an app, seems even easier to use, and we can engage watchers more. I hope the stream quality wouldn't be worse than in the web. Really waiting for IGTV integration though, with the app it seems very relevant to have.
Good luck with further updates and thanks to the team working on it!