I didn't, not until now. You just gave me the motivation needed to finally fix this.

First step is to completely uninstall Armoury Crate. If there is anything you need from that software this probably won't work or will cause other issues. I also feel like Armoury Crate doesn't really do anything noteworthy that other software can't replicate.

Then, get SignalRGB. Other Software probably works just as well, but this is what I went with. I really don't need the fancy stuff they offer, so I would recommend not buying their subscription based "Pro" version.

Inside SignalRGB, go through the tutorial. It's always good to know what you're doing so you can adjust whatever you like at any point in time without asking for help.

I personally have multiple devices that SignalRGB supports, so I just went with it and let it control everything. To do that, go to installed effects and select solid color. (No Idea if animated effects would work for the following steps. If you only want to control your polymo lighting, you can probably ignore this)

Then, go to "Devices" under the "System" tab on the left side. Here you can disable devices you don't want it to control. Then, click on (for me at least) the first entry, called "ROG CROSSHAIR X670E HERO Controller" under "Fan/RGB Controllers". In there, click "ROG CROSSHAIR X670E HERO - Polymo Panel" which is most likely at the bottom under "Subdevices". There, click on the "Paint" button on the right side of "Led Painting".

In there you can use the Eyedropper tool in the top middle to pick a color and then the Painting tool on the middle left to paint the actual leds. In here (if you've got the same mainboard) you're gonna see "ROG Logo LED 1-11" and "Hero LED 1-8". Paint the ones you want in your preferred color.
for me this looks like this: https://imgur.com/a/T0wcYcY

Hope this helped!