According to Land Rover US site:

"The P400e is fitted as standard with a tire repair system and a spare wheel cannot be accommodated in the usual under-floor location. However a wheel bag and location strap system is available as an accessory through Land Rover Retailers that will enable a reduced section or full-sized wheel to be stored safely in the cargo space when required."

Does anyone here have a spare tire in their P400e? Or have seen pictures of it?

An off road vehicle without a spare doesn't make so much sense to me. I wouldn't want to be without one on the road for a normal car for long trips. I'm happy with the full size spare in my petrol L405 even though I have thankfully not needed it yet.

Does anyone know if the 2022 (L460) PHEV will have a full sized spare?

I wouldn’t be surprised if (like most hybrid stuff) there isn’t room for a full-sized wheel in the new one, it takes up a lot of space. This is the current P400E “solution”:

https://store.landrover.com/lr112405-bag-spare-wheel-storage.html