Is your Push 2 plugged into an outlet? The Push 2 needs quite a bit of power (way more than the first Push) and some adapters wont transfer power at all—is your push on before you start ableton? Not that it matters, but if your Push isn't even pulling power from the USB; its the hub.

I use this hub and have not had any issues.

https://www.amazon.com/dp/B07PPZPHV8/ref=cm_sw_r_cp_apa_fab_oGKCFbMYX6PB9

Do you think this would work well with Samsung dex?

try this Updated USB C Hub, POWLAKEN 11 in... https://www.amazon.com/dp/B07PPZPHV8?ref=ppx_pop_mob_ap_share