I only just switched to Linux last month that time I don't know what Wayland or X11 is and I just use Linux like normal without knowing I'm using Wayland (KDE), now since I'm already configured my KDE desktop on Wayland and I don't wanna do it again, so I'm looking for a remote desktop that work under Wayland not locally but from anywhere does anyone know software like that exist? (Sorry for horrible English)
We use NoMachine at work too, for WFH users' remote access to internal servers and virtual desktops. It's a nice tidy solution, it was forked from NX library from the X2GO project about 10 years ago and went commercial, they used the commercial money to continue to develop the technology.
Given it was forked from NX/X2GO it definitely works better on Xorg than Wayland, it seems like Wayland support was added as an afterthought bolted on.
What version of kde? I haven't tried it, or read about it beyond the changelog, however the latest beta release says that it supports RDP to connect to plasma desktops which is quite an interesting development if it works the way it sounds like it does:
Remote Desktop system integration to allow RDP clients to connect to Plasma desktops, plus a new page in System Settings for configuring this
For the "from anywhere" component you could use a vpn, but if you're looking for a simple solution with zero configuration than nomachine or rustdesk seem more appropriate. Just thought the RDP support was worth sharing.
If you want to access your computer from outside your LAN, it would be a good idea to at least secure it or, unfortunately the best, learn to understand what you are doing
Coming back to the topic, though, I'd start with checking these out
The only success I've had to connect to my wayland desktop was with Gnome, (at the time, it only worked if I was already logged in, though there was an extension that let you overcome a locked desktop). Once in, it worked well. Sort of. Had no luck with KDE, though that may have changed. VNC gave me no end of difficulty so I gave up.
All in all, a bit of a fiasco. YMMV - I'm sure my own incompetence was to blame (but should it not be... easier?)
https://apps.kde.org/krdc/
Last time I tried it it was crashing and couldn’t remember permission to use input across sessions, but it was a while, there could be some improvements