Try https://getlumina.com/ for a phone quality looking webcam with nice background blur and center-stage type auto-framing. Or, Logitech Brio w/ Xsplit Vcam https://www.xsplit.com/vcam (but Lumina does a better job auto-starting with videoconf tools).
Alternatively, get Reincubate's Camo to do Continuity with both iPhones and Android phones, and tons more features:
I think that most would be surprised to see a company selling a laptop for $1700 (CAD) in 2022 with a 720 webcam
https://www.apple.com/ca/macbook-pro/
Doing this, then advising you can use your phone's camera seems like an ugly hack.
It is also really awkward to be on a conf call using your phone as a webcam, then needing your phone because something important has come up.