Air Transat has proper long haul configuration in its A321neo, 12 club seats (lie flat) and 187 economy 18 inch (46cm) wide, 31 inch (79cm) pitch, with seat back entertainment screens, and usb ports
It is not high density short haul, no screens, no business class, close to 240 (narrow) seats packed in that can get on some European airlines that use short haul configured planes on 4-6 hour flights.
I have been on an EasyJet A321neo with all seats taken, to Tenerife with headwinds, so nearer 4.5 hours. Not pleasant, and those in back few rows, and front few rows had a semi-permanent queue for limited number of toilets in the aisle. And many near the middle couldn't get any hot food (because it ran out) unless they had pre-ordered
So it rather depends on the airline, and how money grabbing, or upselling mad they are