here, this explains the process. https://www.unrealengine.com/en-US/support/report-a-bug
if you have trouble with that, which sometimes happens, you can try posting on the forums.
i’m not sure the exact category but usually on the Request&Feedback i’d say is a good place. add something like “[BUG]” at the start of the title of your post. and epic staff will notice. i’m not sure they reply but afaik they take a look. the bug forum is more likely to be seen.
https://forums.unrealengine.com/tags/c/general/feedback-requests/50/unreal-engine
but if you put it on the forum, you can get traction from other users that have the same issue. and maybe get an alternative solution.
this is an example UE5.6 Bug: Traces don't hit when starting inside a mesh & using complex as simple collision
make sure to post information about your environment. os, driver version, gpu manufacturer, engine version, and source/binary. and any other info you can gather. logs videos and screenshots are helpful too.