Couldn't find another article on this so here:

I was trying to get a Hoglin to the overworld to get a Zoglin so I can get progression on an achievement; to slay every mob, where do Zoglin counts but once going through the portal it cannot teleport

edit: Found out that it's a realm problem, I also tried to bring a Ghast to the overworld but it didn't work in a realm but when trying in my own survival world it worked straight away.