If you follow the official instructions to setup RPM Fusion on Fedora Silverblue, you will install version specific packages (e.g. rpmfusion-free-release-37-1.noarch) that will cause you trouble on major updates. Fortunately, you can easily replace them with packages that will follow whichever version of Fedora you are in, thus not breaking between updates. To do so, simply run:

rpm-ostree update \
    --uninstall rpmfusion-free-release-<version>.noarch \
    --uninstall rpmfusion-nonfree-release-<version>.noarch \
    --install rpmfusion-free-release \
    --install rpmfusion-nonfree-release

Where <version> is the version targetted by your current RPM Fusion installation. You can check that out by running:

rpm-ostree status

Sources: [1]