You’ll see the original PS1 boot screen and get a few pop-ups introducing you to the feature. Click through the pop-ups to be taken to a page where you can select one of the available themes.

News The PS1’s Iconic Boot-Up Is Now Waiting For You On Your PS5 The PS5 can also cosplay as a PS2, PS3 and PS4 as part of PlayStation's 30th Anniversary PlayStation ...

The highlight of this update is a tribute to the original PlayStation, or PS One, which debuted in 1994 and transformed gaming with its groundbreaking 3D graphics and iconic boot-up sequence. PS5 ...

On the other hand, a few players expressed relief that they will not be “flash banged” by the PS1 boot screen again. I’m personally delighted to have my PS3 UI theme and sounds back again!

The PSOne theme for the PS5 UI is back thanks to the PS5 system update, but the boot up screen isn't included.