Good six+ button wired or wireless left-handed Mouse for Boot Camped system?

I'm physically limited and solely have functional use of my left hand.

I previously used a Razor DeathAdder Left Handed Edition and am now making do with a Logitech MX Anywhere 3 that has to be set up as a new mouse every time I reboot between OSes! Additionally, despite the manufacturer classing it as an "Ambidextrous" mouse the two side buttons are only on the left side!

I need a left handed or truely ambidextrous mouse that can be used in Mac and Windows mode without reconfiguration and also allows redefining button assignments in both Mac and Windows!

Solution 1:

Contour https://contour-design.co.uk/products/one-handed-mice/unimouse/ has left-handed mice but only 5 buttons and a scrollwheel which is also a button.

For the mac it needs no configuration. It does have a driver that allows some configuration.