Our son had a sizable gap because of his lip tie at that age. No doctor or anyone else ever mentioned doing anything about it, but OP, I have to confess that I wondered whether we ought to look into it. Then one day before age two he slipped and fell and cut his lip tie. The teeth grew together almost immediately and now, at age 12, he has perfect teeth.
Not to say you should push your kid down to try to break his lip tie!

Just that I get what you're saying, I think, and I've been there (sort of). I do think a gap between the front teeth is very, very cute.