Hi, @Geewiz
Is your device currently using a SmartThings driver or a custom one?
By default, a configuration to “reverse” the values isn’t exposed. So, you would need to create a custom driver for this purpose. Do you have some knowledge related to development? This means you can use a code editor, console commands, etc. I would help you step by step, but I don’t want you to be uncomfortable.
You could also take a look at the Custom Drivers here in the forum to check if they expose a setting to do this, but I haven’t seen this before.
The ones that most people have chosen are in the channel shared in this post: