After looking at reviews and the official Argon instructions I can see that the Argon POD Display seems to consume ALL GPIO pins. Looking for confirmation that this is the case. I would love to use the Argon POD + Display but I need access to the GPIO pins for some sensors.
I just bought one pod system myself and I’m having the same question.
After researching it looks like the POD Display is actually manufactured by Waveshare.
The pod system looks great but the support is pathetic, the installation script half-works only with the bullseye GUI images and I never got the buttons to work out of the box.
Kinda sad that no one from Argon replied to your basic question about GPIO pin mappings 
I just pulled the display apart and there appears to be a ribbon cable that could have been transitioned to a CSI format. Sadly they didn’t.
Per the waveshare wesbite, THEIR O.E. product only requires the pins 1-27. If true, you could use 90-degree headers on the rest of the pins.
I’m going to throw my two displays into “useless junk” pile. Too much of a pain to try to make use of them.
Pretty much what I did, I trashed the whole POD thing and never looked back. Sadly the case looks good but it’s a piece of useless junk, and the total absence of anything useful here on the forums ain’t helping either.