Can ovarian ectopic pregnancy happen if your not in puberty?

i doubt it... if you're not in puberty you haven't released any eggs from the ovaries.

Ova or say egg is fertilized by sperms in middle of tube then it move to uterus to get implant, if by any chance it could not move to uterus due to some obstruction in the way, this will start growing in tube, this called tubal pregnancy. This can happen to any woman of her child birth age.

ectopic pregnancies happen well past puberty in most cases. Girls going through puberty shouldn't be having sex

Yes.