I tried vanilla Chrome for my AI2 session, both with and without legacy connection options on the emulated MemuPlay Companion.
Legacy connection entry of the 6 letter code cleared the AI2 connect with companion pop up but did not result in a progress popup. It was followed a few seconds later by a network error connection failure popup from AI2.
Chrome Version 89.0.4389.82 (Official Build) (64-bit)
When the "Use legacy connection" is selected, it goes beyond "20 Establishing secure connection in Chrome" but gets stuck at "sending assets..." at 50%.