Transmasc who also got caught by this. I'll admit I almost put the game down after that, but I changed names to a femme OC's name instead of my own, and powered through. I'm glad I did, because there are a few mentions of pregnancy scattered throughout. Not just in relation to MC's past lives, but some for the current life too. Add onto that some very feminine body language, and to me, this story was clearly written from the perspective of a cis woman.
While the desire to appeal to a wider audience with gender ambiguity is noble, I think fixing MC's gender would probably be a better fit for the story you're telling here.
That being said, once I did change the name and shook off the misgendering ick, I thoroughly enjoyed this. I got all 12 endings in 22 cycles.