So far, Kailah has mentioned her boyfriend in passing, but she established she does have one back home. At least, when filming was still going on. She dated Michael “Mikey P” Pericoloso on and off for a few years before they finally called it quits following her stint on The Challenge: Total Madness. You might know Mikey P from American Ninja Warrior and MTV’s How Far is Tattoo Far, on which he appeared with Kailah in May 2019.
In November 2019, Kailah and Mikey P tweeted at each other about what happened when she filmed The Challenge and she said they would talk about it when she got home. Then, in February 2020, Kailah tweeted about having lived in Las Vegas for two years, meaning she moved and, likely, had broken up with Mikey P at the time or even before then, since they had lived there together. She also replied to someone on Twitter that Mikey P cheated on her throughout their relationship, so there’s that.
Source : https://www.distractify.com/p/who-is-kailahs-boyfriend-the-challenge