[McRat]

Jaguar makes a whole assortment of pet transportation items custom designed for the I-Pace. Not cheap though, and be aware, items are a-la-carte. Then even have a dog ramp so you don't have to lift your heavy dog.

Here are but a few: https://gear.jaguar.com/us/en/i-pace/interior/pet-products/

But look through all the pages and menus. If you want the dog in the back seats, there is a gadget for that. There is a fence to keep fido in the back. Side protectors, etc.

My dealer even has a 'pet lobby' for folk who bring their dogs with them.

 

[McRat]

There is a widely held myth that dogs hate being inside enclosures. It's not true. Dogs naturally live in dens or caves. It's less stress on a dog to be able to nap in a small area.
I still can't convince my wife of this, so dogs have the run of 1/2 the house. We use electric mats to train them about off-limit areas, a kennel area inside the house for company, that has a dog door to their 12'x30' dog run on the side of the house.

 

[McRat]

Thanks for this, I called both dealerships in San Diego and neither could see the quilted luggage compartment liner (which would be perfect for us) in stock or in their database. Both parts people said that maybe the car was just too new but they weren't sure, and both said they would look into availability and get back to me. I've yet to hear back from either but will post an update if/when I do.

Look for the PN of the accessory on E-Bay. It might even be at a discount.