As the screenshots show, I have the accounts setup to allow remote connections but as shown in the second screenshot I still cannot connect remotely.
MariaDB packages bind MariaDB to 127.0.0.1 (the loopback IP address) by default as a security measure using the bind-address configuration directive. Old MySQL packages sometimes disabled TCP/IP networking altogether using the skip-networking directive.
Steps to allow remote connections are provided in the MariaDB Knowledge Base at https://mariadb.com/kb/en/mariadb/configuring-mariadb-for-remote-client-access/