I’m afraid I am correct.
I switched to tumbleweed because Leap only gives versions which are way out of date and discovered that appimages don’t work. A significant part of my workflow was done using appimages but I’ve had to install packages.
You only have to google “appimages don’t work in tumbleweed” to find that there is a problem dating back around 3 years - there was a workaround but when I tried it I got a message that, even with admin privileges I couldn’t make the changes. Curiously I can use appimages from my admin account, but not my ordinary non-admin account - which defeats the security reasons for using an ordinary account.
I haven’t had the energy to deal with yet another forum to try and find a fix for it
see this discussion ART & Tumbleweed