Is Ziggy a Presa?

Hi all! This is my 2.5 year old pup Ziggy. I found her at a shelter at 1 year old and since then I’ve been trying to figure out her breed (we plan on getting a test soon for her and our other mystery dog). I’ve done a ton of research on a bunch of large mastiff-type breeds and think she could be a Presa Canario? My cuddle bug is about 110lbs of goofball and the shelter originally said she was a Bullmastiff mix. She LOVES to be cuddled, sits goofy ALL the time, she loves playing with her little brother and other doggy friends, is protective of me (when she needs to be), is the gentlest giant, super patient and sweet with kids, and occasionally very stubborn (mostly after her very loud naps). TIA for any help on her breed!