I had found a workaround to get 2 external monitors to work on my 2019 MBP. I have a docking hub with both monitors plugged in via HDMI (+ other peripherals) that works for my work PC.
For my MBP, I would plug the hub into 1 thunderbolt port on the MBP + 1 monitor connected to a Displayport adapter and plugged into another thunderbolt port. Viola! 2 working external monitors for my MBP (3 if I left my lid open).
Now, I have updated to a 2023 MBA and when I plug the hub in and the DP adapter, I cannot get both monitors to work independently like they did with the MBP. I either get both monitors mirrored OR only the monitor connected via DP working. Basically, the MBA won't connect to both inputs and I get strictly one or the other. Any advice?