I suspect (based on similar issues years ago) that you could get it working on MacOS in either one of two ways:

1. Set a password for the setting “VNC viewers may control screen with password:” in the screen sharing settings. Most of the issue with standard VNC clients is that MacOS uses MacOS-specific login security, but setting a password opens it up to VNC-standard security

2. Install an alternate VNC server on the Mac. This bypasses all the MacOS security nonsense.