Here's an NPR article interviewing a known geneticist and talking about Trans Athletes. Their general consensus is that there is a lack of data to make an assertion one way or the other for if trans athletes have an edge. And that's without taking into account the vast differences between each individual trans person and where they're at genetically/hormonally. Trans athletes aren't a monolith that are all the same, they can have fundamentally different circumstances and genetics between each person.

Honestly any automatic ban of trans-athletes is stupid. Michael Phelps has a natural genetic advantage when it comes to swimming, but no one of note is coming for his gold medals or saying he can't compete.