MCBE on iOS does not recognize side mouse buttons

I play Minecraft Bedrock edition on my iPad using a Bluetooth keyboard and wired mouse. Unfortunately, I cannot use my mouse side buttons as key binds because Minecraft does not recognize them as viable input.

I am using the Glorious Model D Wireless gaming mouse. The side mouse buttons work on Windows 10 BE and can be used for keybinds. They also work on Java Edition.