Gaining

I had success with heavy cream, but I noticed that the fat visibly concentrates in my lower belly. Has anyone else experienced this or knows if there's some way to "balance it out"?

If you figure out how cream is doing that for you, I'd personally like to increase belly fat as much as possible.

To be precise it doesn't go only into my belly, but it goes disproportionately to the lower part of my belly. I want my belly to be more evenly fat.

It’s because heavy cream favors subcutaneous fat, which tends to gather in the lower belly (and places other than the belly) but not in the upper belly. If you want your entire belly to be more round, you could try eating a lot of sugary food along with your cream to try to gain some visceral fat, but that’s also less healthy.