My take:

On one hand......  there are like 3 times more PS5's out there, than Xbox Series consoles.
And Gamepass might play a small part too in this.

So a 80-20 split favoring the PS5 shouldn't be surprising right?  This is for game sales total (digital included)

What are you guys thoughts?

Is doing 1/5th of the total sales on xbox, a issue vs the playstation console?
Or is this just a "it'll cost more to money hat exclusives" issue?

Of course it is. MS has zero choice in releasing their games on all platforms.

There are 3x as many total PS5s than XBS. That alone would put it into a 75/25 situation.

Then there is Gamepass and PS+, where I believe people would actually wait more for a game to hit the former rather than the later.

80/20 is a given, should be actually closer to a 85/15 ratio, but the higher it goes the harder it is to ratio to increase because of the install base of 1/3 from Xbox is a big number of total people regardless.

So between 3:1 and 4:1. Hardly surprising.

Edit: I should note that I'm talking about recent PS5 vs Xbox Series titles. Not PS vs Xbox as a whole. I'd expect the gap for crossgen and earlier titles to be smaller.

I’m pretty skeptical of this, even from what should be a 100% reliable source. Most sales estimates, for individual games, put the ratio much closer than that when Digital is taken into account.

If this is true then it really shows why 3rd parties heavily support Xbox because that's 20 - 25% of their revenue for little port costs. Doesn't shock me multiplayer games would be a closer split than single player.