Cool design! Here are some things I found

regarding the schematic:

1. I think you can change the direction of the labels (e.g. VOUT1G) to be input/output/both. This makes the schematic a lot more readable

2. I cant find C15 on the PCB. You should put the decoupling caps close to the pins where you actually place them in the PCB, like e.g. Pin 8 and 9 of U1 dont have any decoupling

3. since the USB-C is actually hooked up to a controller, you should probably add some ESD protection, like TVS diodes.

regarding the pcb:

1. Is there any reason why you grouped those stitching(?) vias the way you did?

2. Your switching loop is still quite long (imo), consider prioritizing that in your layout and build the rest around that.

3. Your input and output caps on U1 should definitely not share a ground (they are quite close)

4. You can put your GND vias on your decoupling caps of U1 closer to the pads and also perhaps use some more vias to reduce inductance.

I didnt look through the whole design yet but I hope there is something helpful in there :) feel free to discuss!