Check RHEL Version
rpm -E %{rhel}
7
epel
amazon-linux-extras install epel
PHP
Method 1: Install PHP 8.0 from OS repositories
amazon-linux-extras | grep php
Method 2: Install PHP 8.0 from REMI repository
yum -y install https://rpms.remirepo.net/enterprise/remi-release-7.rpm
yum-config-manager --enable remi-php80
yum repolist