I'm not sure there is a salacious story about her husband leaving her. I think it's more a case that they've been together since they were young and had grown apart/grown curious about what else was out there, but just went along with the wedding and house because that's what you're 'supposed' to do. And once the novelty of wedding planning and gorgeous honeymoons had worn off, they didn't have anything left.
I don't think I judge her much for getting into a new relationship, as things could have been emotionally over for a while before her relationship officially ended, but I do think she's showing how emotionally immature and just plain dumb she is by splashing it all over social media. The photos of them cuddled up in bed are just embarrassing full stop, no matter how long you've been with someone.
Also... I'm assuming she's been breaking lockdown left right and centre to get this new relationship off the ground?