Nooo this is not the right definition. Pan is liking people regardless of gender. Omni is being attracted to all genders but still taking gender into account. Some onmis do have preference but they don't have to and that's not the difference.

don't have the flag here but
Platoniroallo- being platoniromantic (unable to tell the difference between platonic and romantic attraction) but also allosexual (experiencing sexual attraction). This is my sexuality!