hot to put my 2d image among my 2d VFX

hi all
I am bought an 3d VFX

but i found i just can put the VFX before or behind my 2d character

how can i setting my game to put my 2d character among the VFX

when you buy from the store you should ask your questions to the creator of the package because people of the forums usually dont have that asset

also you just paid to that person so he should give you support