Betta Fish: Is my betta a male or a female?

Hello everyone! I am here reaching out to see if you all could help me identify the gender of my betta fish. When I first got it, the fish was labeled as a koi betta female but as she grew up (she was so tiny btw), but she grew really big. She is basically 3 inches right now. As she got older, it became harder to tell. She kinda looks like a giant (king) male but she also looks like a female based on her body shape. I'm pretty sure I can see her egg pouch near her gills and also her anal and pelvic fins are shorter than a male. I'm pretty sure she is a female. What do you guys think?

Btw she is in a 5 gallon, fully planted, cycled, heated and filtered tank. Super healthy and happy!