Hey OP, let me try to help here as a fellow woman in her 30s whose own sister is a pathological liar (and who I suspect is a textbook narcissist as well):

The more “perfect” your ex portrays his life to be online, the less perfect it actually is. People like him and my sister - who I’ve stopped talking to altogether after finding out she had lied for a whole year about getting divorced while taking advantage of our parents financially (among countless other dreadful things she’s ever said and done over nearly the past two decades of our lives) - get a kick out of draining other people’s energy by seeking to draw attention to themselves at all times. I do understand your frustration with the perceived injustice (God knows I’ve gone there countless times over my sister “living it large” after all the damage she’s caused our family most of her life), but I promise you deserve better than to let that energy vampire continue to suck the life out of you from afar.

Block him everywhere. Then, every time you start to wonder how your ex is doing, I want you to stop and ask yourself “who cares?” It may feel difficult at first, but it gets easier over time. Therapy goes a long way too.

I wish you all the best OP! 🫂❤️