Where can I find available flatpak versions?

I cannot find what versions of the runtime or sdk are available.

https://docs.flatpak.org/en/latest/available-runtimes.html does not give any details and the link to the GNOME gitlab page also does not say anything about versions.

Hej,

not sure if we have an overview page for this, but you could check for the available versions via the CLI:

flatpak install flathub org.gnome.Sdk
Similar refs found for ‘org.gnome.Sdk’ in remote ‘flathub’ (user):

   1) runtime/org.gnome.Sdk/x86_64/3.24
   2) runtime/org.gnome.Sdk/x86_64/3.26
   3) runtime/org.gnome.Sdk/x86_64/3.28
   4) runtime/org.gnome.Sdk/x86_64/3.30
   5) runtime/org.gnome.Sdk/x86_64/3.32
   6) runtime/org.gnome.Sdk/x86_64/3.34
   7) runtime/org.gnome.Sdk/x86_64/3.36
   8) runtime/org.gnome.Sdk/x86_64/3.38
   9) runtime/org.gnome.Sdk/x86_64/40

Which do you want to use (0 to abort)? [0-9]:

Keep in mind that everything but the 3.38 and 40 SDKs are EOL by now though.

There’s also the nightly SDK from gnome-nightly remote, which ships the latest versions.