How do I decrease the effect of spatialization?

Im creating some sound effects and I want I them to be in stereo/ spatialized. But when I do it affects 100% so that when the left ear is pointing at the sound origin I hear 0% in the right ear.
This does not feel natural for me and I would like some audio (20-70% ish) to also be heard in my right ear. But I cannot make this happen! I really thought I would be able to do it in the sound settings here:

I have also tried to download the UE plugin for spatialization but don´t really understand how to use it, or if it can solve my issue?

Have you tried setting the spatialization method to binaural?