Platforms
On PlayStation 5
What the PS5 listing supports
The PlayStation 5 version targets 60 frames per second. Konami's sizes are 8 GB for standard, 10 GB for Midnight, and 6 GB for the demo. There are separate store products for standard and Midnight. Steam's feature list also marks DualSense, which is the controller note worth repeating for the console version. There is no PS4 build.
Resolution and load-time comparisons against Switch are not in the official spec table. I am not estimating 4K or a number of seconds. The verified contrast is 60fps and 8 GB here, versus 30fps and 4 GB on Switch.
Where to download
Konami's product page links the PlayStation store products for the full game and a separate demo product. Those URLs are collected on the download page. Physical PS5 copies are at the same retailers as the Switch and Xbox boxes.
What I ran into
I left a 4K claim in a draft because the Xbox page has one. The PS5 sources I used do not say 4K. The sentence came out. Frame rate and gigabytes stayed.
Questions
Is it on PS4?
No. PlayStation support is PS5 only.
How big is the PS5 demo?
6 GB, from Konami's demo specifications.