SME 10 is based on Centos 7 .
we rely on software collection to provide the extra version of mariadb, maximum version offered by RH was rh-mariadb105
SME11 will rely on Rocky 8 and hence up to php 8.0 using modules and mariadb-10.5. Also remi will be kept as source for php fpm versions
you can still try to play with
https://downloads.mariadb.com/MariaDB/but the result is that core packages relying on mariadb 5.5 on SME10 will fail, also the current script to load mariadb will fail with higher version .
also we rely on epel version of phpmyadmin and it will liekly not support edge version of mariadb.
That is the point of using SME and enterprise linux solutions, they are build to last on robust versions, not to surf on edge softwares