For this use-case am I using Teamviewer because it works on both Linux (Ubuntu) and iPad. I enable it on my Linux trading server at home before I leave and then do the weekend re-logon remotely from the iPad. There is one big caveat though: This does NOT work on Ubuntu 22.04! Make sure that your Linux box uses an older version of the Ubuntu OS.
Why not just use VNC? There's VNC clients for iOS. TeamViewer is unnecessary.