What am I looking at? I'm not really sure, is it some sort of Citrix replacement?

I tried to look at the documentation but was left with more questions, the "free" version mentions "Linux server" (not even the GNU utilities?) and is just available as a curl | bash (but the apparently targets RHEL, Suse, Debian/Ubuntu and Alpine) and I started to glance through the git

"mysqldump -uroot -h127.0.0.1 -p jumpserver -P3307"

I think I'll stick with wireguard, headscale, netbird or tailscale, depending on scenario.

More like a replacement for something like CyberArk than for Citrix.

It's not so much about the remote access as it is about control and auditing.

i.e. ability to permit/deny certain commands/behaviours, and a complete audit log of the session, sometimes extending to a screen recording of an rdp session.

At first glance, it looks like a parallel-universe Linux version of JumpCloud.