MariaDb JDBC Driver and Virtual Thread support and limitation

I would like to know the level of compatibility of the JDBC Driver of MariaDb with the new incoming virtual thread model of JDK-21. Does the JDBC Driver is free of "synchronized" keyword and therefore will not block the virtual thread ? So with one physical thread running virtual thread using many JDBC Connection I could theoretically launch many query in parallel ? What about XA ? What about server side Prepared Statement ? And so on ...