This is on a fresh install of actual CentOS 8.3 (on a virtual machine) using the official install.sh.
AH00526: Syntax error on line 509 of /etc/httpd/conf/httpd.conf:
Invalid command 'php_admin_value', perhaps misspelled or defined by a module not included in the server configuration
Actually, I have the same error on the physical testing server running Virtualmin on AlmaLinux. Oddly enough, Apache was still running; but once stopped, it won’t restart. Spits out the error in my previous post.
Commenting the line out allows Apache to restart. Probably has something to do with it being PHP 7.2, when the site I imported for testing purposes had been using 7.3 or 7.4.