Could the door simply be the same as the unlimited? Sure looks like it to me.
I would almost bet 100% that the doors are straight off the JL as much of the front cab (B pillars forward). It would not make financial sense to reinvent those items. Frame definitely different as it being longer and using leaf springs in the back. Rear half of cab and bed are unique as well. Be interesting to see if the rear axle is the same as the JL, given it's larger weight capacity over the JL.
The axles are upgraded over the JL.
They will be Dana M210/M220's instead of the Dana 44's.
https://www.jeepgladiatorforum.com/forum/threads/2020-jeep-scrambler-pickup-jt-info-compilation.21/