How can I submit code on GitHub?

I wanted to make a demo of walking on a small planet before, and I discovered this problem. After locating the code, I fixed it and merged it, but there was no response.
I would like to ask if there is any other process required to merge the code. I really hope to make a contribution to unreal.

Here is my Pull Request:
Fix rotation direction is incorrect by yylogo · Pull Request #11222 · EpicGames/UnrealEngine (github.com)