I wouldn't expect any issue migrating from a CentOS 8 host to a RHEL 8 host.
On the WildFly vs EAP part, if your app runs well on WF 14 it should run fine on EAP 7.2 as well. If you don't know if it will run fine on WF 14 (i.e. you are running it on a later WF release) whether it will run well on EAP 7.2 depends on whether you are taking advantage of any WF features added after 14.
If it runs on WF 11 / 12 / 13 it will likely run fine on EAP 7.2 as well.