I usually use Windows and Android, and these two platforms can be linked via Microsoft's "Link to Windows", or "Phone Link" program. So, you can easily use some features such as notifications, messages, screen mirroring, and clipboard synchronization on Windows from your Android phone.
Recently, I changed my personal computer to macOS from Windows, and it made me need a similar program. I developed this program to run on macOS while still using the "Link to Windows" app on Android phone.
It supports most features of the Windows client (notifications, messages, photos, mirroring, file transfer, etc.), except calling.
The license is MIT. This project is an unofficial client unrelated to Microsoft and has no affiliation with them.