Digging deeper into the Amazon movies, I found 2 that approach father/son relationships in very different ways:

COME TO DADDY

Elijah Wood plays a trendy young man who gets an apologetic letter from his estranged dad, which sparks a trip to a remote cabin so they can reconnect. It’s not clear from the outset where this narrative is headed. It appears to be a drama with packed emotional potential, but about half way thru it turns into something very different. I don’t want to spoil it, but it becomes dark and violent (think Cohen Brothers without the humor). Despite some questionable chinks in the logic and no real suspense, this film manages to be a somewhat unique little venture.   (3 / 5) Amazon Video link

I HATE KIDS (review)

At his wedding rehearsal dinner, the author of the titular best-selling book (Tom Everett Scott) finds out he has a son by another woman. He sets out with a flamboyant psychic (Titus Burgess) combing thru his list of previous hookups to find the boy’s mom. While there’s plenty of potential in the setup, almost none of it’s realized. Scott has handled comedy before with success and Burgess is naturally funny, but neither of them have much to work with here. On top of that, the mom encounters try way too hard to be quirky. The energy never lags, but the script never provides any moments of genuine humor. (Look for a cameo from director John Landis as another psychic.) (1 / 5) Amazon Prime Video link