Evoluent 4 Driver for Monterey

Evoluent claims it is Apple fault since Apple has not provided Evoluent with required information:

"Apple Mac® OS X 10.15 and newer 

"Due to recent Mac OS update, our driver must be updated to maintain compatibility. We need a driver development kit from Apple but they have not replied to our request even after repeated emails. Therefore our driver development is unable to proceed. We apologize for the delay and will continue to contact Apple for the resource. Alternatively, the third party software USB Overdrive www.usboverdrive.com may be used to program the buttons on VerticalMouse. (Evoluent is not affiliated with USB Overdrive.)"

https://evoluent.com/products/vm4rm/

If the user would go to https://evoluent.com/support/ and the Download page of their site.

You will find the macOS section specifically mentions their Software used on Mac OS is only supposed up to macOS High Sierra 10.13. and newer/

The important element, Starting in macOS Catalina 10.15 and above, all Extensions must be writing for 64 Bit and there is No Support of Anything 32 Bit

You would better served contacting the Manufacturer of this device for Specific Software that supports Monterey macOS 12

refer to below image

There is nothing for Apple to Fix.

Does Apple make this Third Party Mouse ?

Does Apple Own the Maker of this Mouse ?

It's not an Apple issue. If your device requires you to buy software that's your responsibility. Apple provides a compatible mouse with the purchase and that's their "fix" right there.