That probably is an internal power supply (1U style). And the one I have won't match it.

It use to take about a week to get a power supply from Hikvision. With logistics & the chip shortages these days, who knows.
I believe it is made by Delta Electronics but I haven't found a supplier state side that sells those models.

I'm sure you know what cost is on those 8ch NVRs from Hik. Considering how cheap they are, it makes more sense just to buy a new one rather than screw around with trying to repair it.
[Link: amazon.com]