Compatibility
Fedora image based variants
The primary target for those sysexts are the official Fedora imaged based variants (Fedora CoreOS, Fedora Atomic Desktops, Fedora IoT), whether they are Bootable Container (bootc) systems or classic ostree/rpm-ostree ones.
Those systems are the primary target as it is those images that are used as the base to figure out the dependencies to include in the sysexts.
Universal Blue images (Bazzite, Bluefin, Aurora, uCore)
The sysexts should also work with the images from the Universal Blue project (Bazzite, Bluefin, Aurora, uCore) as they are derived from the Fedora Bootable Container (bootc) images used to build those sysexts.
Other images derived from Fedora Bootable Container
The sysexts should also work with images derived from a Fedora Bootable Container (bootc) image but you will have to verify the compatibility on a per image basis.
Other Fedora image mode systems
The sysexts may also work with other Fedora image based systems such as those built using mkosi, but you will have to verify compatibility on a per image basis and potentially rebuilt the sysexts to include missing dependencies.
Per-sysext compatibility notes
Make sure to look at the compatibility notes for each sysext. Some are only meant to be used on specific Fedora image based variants.