Hello,
Pin 1 and 8 of UCC27324 is not connected to internal silicon.
In general it is a good practice to connect these pins to GND, but it is acceptable to also leave these pins in floating condition.
If pins #1,8 are connected to ground, then the IC footprint will not be able to accept other product options such as UCC27524 or UCC27424, where pins 1 & are ENABLE pins.