I might be in the minority here but fir me that decision is fine.
The arms (both) are outstretched away from his body, thus making himself bigger.
The arms are still moving when they block what for me looks a goal bound shot (instep of forward at an inwards angle towards goal, keeper on floor).
I think it is a DOGSO and correct in law.
I'm OK with your view RefObserver, but this was an 'international friendly' and I would ask the question, what the so-and-so was VAR being used in this and a few other 'friendlies'? From what I saw of the incident, this was one which the ref would not have given had VAR not checked it out. As it is, a Welsh player has to sit out a game in the build-up to the Euros, and if VAR is used in the remaining friendlies to come, then a player could be sitting out the first of the Euro group games, which seems patently unfair. All or nothing in my view!