Port Maje - around 1m 30s
Neketaka - around 2m
around 1m every time you change from a location to a world map
so... it's ridiculous. you're loading more then you are playing.
I have PS4 Pro (regular, no SSD). I finished PoE I on PS4 with a lot of patient (actually, two times as I was for a platinum trophy), but at least it was playable. PoE II freezes every time you change a single item on any character. It was freezing on the first cut scene in Neketaka. I couldn't pick up one crew member in a cave, as two enemies were not counted as enemies and I couldn't finish the event (re-load didn't help, re-loaded two more earlier point and skipped location..). Sometimes cursor is disappearing in the trade menu, and I can't buy anything - at least quitting the game and reloading helps here.
Instead of having some useful link on a touch map (usually it's a map), there's a link to tutorials. You won't need tutorials the most part of the game. This option could be customized, but no, it's not.
I finished PoE II on GOG on the release date, and I waited so much for PS4 release... But, unfortunately, it's a frustrating nightmare. I'm not sure if I'm going to play it anymore. I'm in Neketaka now, and I'm scared realizing how many times I need to go in or out from buildings and see these load screens...