Hello,
I was trying render white products on white background tutorial but I couldn't . I have problem with lighting pins. In the tutorial reflections on the product are linear I mean they are slim and tall rectangles but when I tried they are too big. I tried changing size x and y but it didn't work.
Sorry for my English...
what is the size of the HDRI in the settings tab compared to your object? if your object is 30cm high but your hdri is 30,000 that would cause a problem. Try to get them to match a bit more realistically.