libheif is not part of Fedora (likely installed from
rpmfusion-free) and the update was not coordinated between Fedora + RPM Fusion (as expected - RPM Fusion is an independent 3rd party repo. I think there is some progress to rebuild the package but you should watch RPMFusion bug 6158.
Therefore you should not give negative karma to this update.
@tomato: I don't think this is planned for the EPEL exim package (please note I'm just a random Fedora contributor, not an Exim packager) but it should be pretty easy for you to create a COPR repo for yourself. I'm currently swamped with work so I can't offer this as a volunteer for free.
This update can not be installed on CentOS 8:
Problem: cannot install the best update candidate for package systemd-networkd-245.5-1.el8.x86_64 - nothing provides libip4tc.so.2()(64bit) needed by systemd-networkd-245.6-1.el8.x86_64
CentOS 8 ships
iptables-libs-1.8.2-16.el8.x86_64 but the package was build on RHEL 8 with
iptables-devel-1.8.4-10.el8.x86_64. It seems like CentOS is lagging a bit so maybe we should keep the update in testing until CentOS pushed its update to stable.