I'm not 100% sure, but looks like we really have.
With package " zabbix-apache-conf-scl" provide a file "/etc/httpd/conf.d/zabbix.conf"
But Apache may timeout also, additionally to php-fpm itself.
"ProxyTimeout" is what defines that and it's also 60 seconds by default.
For Nginx (package "zabbix-nginx-conf-scl") we set in file "/etc/opt/rh/rh-nginx116/nginx/conf.d":
so we have to do something like that for Apache as well.