Some background: When I hiked the Pacific Crest Trail few years ago, I used to order items that needed to be replaced or that I lost to the next or town stop using my phone (most towns have a general store or a supermarket, often not an outfitter).
However, it's not uncommon for sections of the trail to be outside cell service for days between town to the next one.
Anyhow, since the next trail that I plan to hike, the Continental Divide Trail, is even more remote than the PCT, I started to play with a prototype of a satellite messenger backed service to let me order items from a predefined list (each can match multiple items of a different priority) and be shipped to a predefined shipping address (post offices of trail towns along the trail).
So, for example, assuming that one of my contacts is a phone number that my service is monitoring, I can text a message like that:
items: shoes, tape, filter, usb cable, ice axe;
to: Chama;
eta: 2023-07-01;
If any item on the list can't be delivered until 2023-07-01 using prime shipping (unfortunately it's the easiest option), it should be dropped from the order. Alternatively, if the guaranteed delivery date is off by 1 day, I might just place it on a separate order, hope for the best and if it doesn't show up on time, it'll get returned individually after not being claimed.