MariaDB 10.5.23 was a very stable version which had a long life. You can install Moodle .4.1 LTS on it. https://moodledev.io/general/releases/4.1
4.1 LTS gets security patches till December 2025. https://moodledev.io/general/releases
4.1 LTS gets security patches till December 2025. https://moodledev.io/general/releases