Given the problems some folks have had running it on High, not a good idea.

For 1 your would need to improve the airflow through it.

More in line with reported problems there is then the point of how much power the USB-C PD circuit in it can handle. In most cases the power flows from connector directly into and through the PD negotiation chip. If the PSU says it can provide it, that can be up to either 28 or 42VDC @either 3.5 or 5A at either voltage. Some folks have reported that the chip can get too warm and develop bad solder connections so I would not recommend pushing it.