For those that aren't in the know, Amazon Linux originally was based on CentOS, with some relatively minor, but not insignificant optimizations for AWS. CentOS was a distro meant to be compatible with Red Hat Enterprise Linux (RHEL). CentOS has been effectively discontinued, though several forks were announced.
CentOS was discontinued (surprise) though it was popular. Alternatives have spun up, but they are immature at this point. Due to this, Amazon has basically been shoehorned into switching to Fedora at this point.
My immediate advice is to examine whether you really need RHEL for anything at this point. RHEL isn't the huge driving force it once was. Find something that works for you and stick with it.