I just got this official answer from the support:
I checked internally with our team and have been informed that all ports on the Framework Laptop 12 are DP 1.4 and support charging. The left side ports (1 & 2) are USB 3.2 Gen 2x1 while the right side ports (3 & 4) are USB 3.2 Gen 2x2. We will have more information available closer to launch. I hope you find this information useful. Please let me know if there is anything else you need.
So if I choose an Anker 12-in-1 that comes with USB 3.2 and DP Alt Mode it would probably just du what I need it to do..