Toddler potty training help

My daughter who turns 3 in september is starting to use her potty, now we have done a reward system which worked out great for just peeing, however pooping in the potty has been a huge obstacle. It started off with her crying and asking for her "pañal" whenever she had to poop and we would try to convince her to use the potty for poopy and it wouldnt work. Now she does not freak out anymore she just poops in her underwear. She could have just peed in her potty and she will pull up her underwear and continue to poop in that🤦‍♀️ I'm frustrated at this point because i don't want to yell at her or scare her about going poopy in her potty, but i do need another way to encourage her to go