As /u/illiniaviation mentioned, your AIO is fine. Tubes at the bottom is good. Not sure why they're being buttheads over there but moving on. You want something like this https://www.amazon.com/Razer-Chroma-Addressable-Controller-Compatibility/dp/B08K3TYWP6 not the DeepCool one. The DeepCool is another splitter. You need individually addressable channels.
Alright that’s fair, the best one so far that I’ve seen is the razer chroma RGB hub, is there anything still usb but cheaper?
I have one of these and it works with OpenRGB really well!
Actually never mind, this only supports 3-pin ARGB but I just realized that you said you have 4-pin RGB. Here's the list of supported devices, hopefully one of these supports 4-pin RGB