We've gotta stop mentioning the stand thing, it's just a bit 'Reddit' esque of banging the drum about something that isn't actually true.
The PS5 and PS5 Pro don't need a stand to sit vertically. The included plastic feet are used for it to sit horizontally.
The PS4 could also sit vertically if you wanted - and that didn't come with a stand. You had to buy that dark plastic stand from PlayStation, same for the PS4 Pro.
The original PS3 and then the 'super slim' also didn't come with a stand - both could stand vertically without it.
We can go back and look at the PS2 as well. All of these consoles, out of the box, can sit both vertically and horizontally without the need for the stand - and the only time a console couldn't sit horizontally out of the box, Sony includes a base / plastic feet.