How to show multiple Background Event at a same time slot in Fullcalandar?

I am working on Calendar using a "Fullcalendar" library.

I need to show multiple "Background Event" at the same time slot. I didn't find any related solution for it.

Want to show background event as side-by-side like a normal event.

What I have tried?

I have added this slotEventOverlap negative to show the events differently and separate them at the same time. it works for "Norma" event but not for "Background event"

But this is not working on "Background Events"

 slotEventOverlap:false,  

Please pass your valuable response to resolve this.

from How to show multiple Background Event at a same time slot in Fullcalandar?