In my experience PowerDVD is not very compatible with a remote set up for MP, for me Play/Pause, Stop and Right/Left/UP/Down navigation buttons work as expected and Info will in some screens bring up a menu but I have a mouse function on my remote and use that most of the time to get around it. PowerDVD 18 does have an option to scan in a QR code that apparently allows you to pair it with a smart phone and use that as a remote control but I have never tried it.
Further to the above I tried to install the PowerDVD Remote app on my smart phone (Android 13) but the play store said it is not compatible with my phone and I found nothing about it on a quick search on the Cyberlink website so looks like it is no more! There are some configurable hotkey options but no idea if they are still available with the latest version or what remote control options are possible with the latest version.