Upon migration:

Add Muli font for dompdf pdf exports, copy vendor folder to its location & run copy Mule font command - if composer is reinstalled add font_load.php, FONTS/Muli dir & load Muli font;
Enable selinux setsebool -P httpd_can_network_connect 1;
Check gd has png support;
Update MySql server to disable group by sql_mode= does not have ONLY_FULL_GROUP_BY - edit my.cnf, under [mysqld] section set sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION;
Update CRON calls for outgoing mails;
Update CRON for backup generation & update NAS access;
Check Apcu enabled on Rocky Linux 9 for php74 - sudo dnf update && sudo dnf install php74-php-pecl-apcu-bc.x86_64;
Regenerate SSL certificates;