I see. Yeah, I was on the same search as you some years back. KDE Connect was somewhat promising -- IIRC it worked on Mac and Windows, as well, but it didn't me

I see. Yeah, I was on the same search as you some years back. KDE Connect was somewhat promising -- IIRC it worked on Mac and Windows, as well, but it didn't meet my needs. So now I have various front-end to SSH/SFTP with key-based auth that require minimum effort for day to day use. It transfers fast, too. But I have to build everything first. Good luck! Post here if you find anything you're impressed with.