Since the beginning of COVID, webcams have been hard to come by as vast amounts of people starting both working from home and having school at home. Webcams sold out for months and it seems they are just now slowly coming back in stock.
If you have a Sony camera such as a RX100 or an A-series camera, you can now easily use them as a webcam without any additional hardware. Sony released the Imaging Edge Webcam application for free so if you have a Sony camera, be sure to grab it.
https://support.d-imaging.sony.co.jp/app/webcam/en/