I have two pernettya; supposedly a male and female. However, since I
planted them 2 years ago, I haven't had a single berry. They each get a few
teeny insignificant flowers in spring. The plants are sited about 15 feet
away from each other, but I was told that would be okay as long as they're
within the same garden

I thought I'd move one so that they're directly next to each other, but
other than that does anyone have any advice?

Thanks.