I simply acquired a Mac Studio M1 Max, moreover I bought a thunderbolt to twin Show port adapter: https://eshop.macsales.com/merchandise/OWC/TB3ADP2DPT/

And when trying to attach each shows the primary one related will take 144hz, whereas the second is capped at 95hz. I verified each screens(LG GN950) help 4k 144 and the cables help HDMI 1.4 DSC by connecting to my gaming PC w/ a 3080RTX.

Lastly I ordered TB3->Show port cables to test if its simply the adapter that does not work. However anybody with expertise could be a lot appreciated.

Yet one more factor:
https://tonsky.me/weblog/monitors-mac/

Somebody shared that they’ve an M1 Extremely w/ 2x 4k shows at 144, however no detailed config data

📷 Mac Studio (M1 Extremely, 2022)

📷 2 × Gigabyte M32U (4k @ 144Hz)