Hello,
Yes you can install other software when you deploy with Wazuh OVA without any issues. Bear in mind that you might need to add additional repositories like EPEL, depending on the software you are trying to install. Also take into account the ports used by Wazuh services, you have to ensure the software you would install is not configured to use any port used by Wazuh as it might cause issues.
I hope this is helpful. Regards.