FYI now that MariaDB 10.5.4 is the last stable version, XWiki is adding support for it and following our strategy, dropping support for MariaDB 10.3.x.
See https://dev.xwiki.org/xwiki/bin/view/Community/SupportStrategy/DatabaseSupportStrategy and https://dev.xwiki.org/xwiki/bin/view/Community/SupportStrategy/LatestLTSDefinition/