This is one I am constantly answering for people when they find out I am vegan. I am a trans man, so quite a lot of people ask me whether or not all the soy will slow or stop my hormone therapy changes.
They usually don't like the answer: that my levels are always fine, leaning towards my T being a bit too high. But that only started AFTER I went vegan. Before I went vegan, I did keto for a year, and I suffered from consistently high E and worse blood work results than any other point in my life.
About 8 years vegan now and I am the healthiest I have been in my adult life, no soy side effects at all.