I’m looking for something similar but have not found any yet myself. Displaylink hubs are okay for work but they are low refresh rate and annoying to get working in Linux.
I know it’s not what you are looking for, but I settled on this triple display hub for now. I get 2x60hz 1440p and 1x120hz 1440p out of it. Good enough for now.
There is an arguably better one here that will do all 3 of my 1440p monitors at 120hz, but it had quirks that made it pointless to use. Every time I connected my Framework16 to it, I would have to disconnect all three monitor cables and then plug them back in for it to work.
If you want triple monitor and high refresh and resolution support, you need to look for MST Hubs that support DSC (Display Stream Compression).