Reolink has doorbell cameras[0] that you can keep disconnected from the internet. They also have some pretty useful local recording hubs if self-hosting is not your deal[1].

[0] https://reolink.com/ca/product/reolink-video-doorbell-wifi/

[1] https://reolink.com/ca/product/reolink-home-hub/

Reolink also fixed a problem with some of their cameras that prevented them from working with scrypted fully. I have a bunch now completely isolated from the internet and linked through HomeKit.