Is my ex happy married?

My ex keeps bringing up our past relationship and the woulda, could, shoulda when I moved on a decade ago after our divorce

We co parent and only have a relationship because of this I travel and thriving solo , but it doesn't seem like he's happily married. We ended because he cheated on me and wasn't mature still isn't and his current marriage is full of drama.
Is my ex happy married?
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