Chrome Remote Desktop
remotedesktop.google.com
remotedesktop.google.com
Would that mean my PC would have to be running in an unlocked state in my home whilst I travel, because that could be non-secure if your threat model is sufficiently paranoid.
Still requires you to download additional software, and quality is mediocore. But still cool it works.
You accessed your Mac remotely from another device with Chrome Remote Desktop and had to enter your pass to your Mac? Can you see that happening on your Mac's screen?