In Nexus use remote repository URL:
https://mirror.yer.az/fedora-epel
In RHEL/CentOS - go to /etc/yum.repos.d/ directory
Create a new file or add below snippet to existing file
[Nexus_EPEL]
name=Nexus EPEL $releasever - $basearch
baseurl=http://<nexus_host>:8081/repository/yum-epel8/$releasever/Everything/$basearch
enabled=1
gpgcheck=1
countme=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-8
perform below commands:
yum clean all
yum update
This is worked for me