And you just answered why having a cell phone in the wilderness is the backup to non electronic gear.
I once went on a multi day trek. The guy leading told me he had the maps. What he didnt inform us of was that his maps were on a Apple Watch.
I’ve backpacked 3,200 miles, all of them on the Pacific Crest Trail, in CA, OR, & WA.
First tools, compass and paper maps in hand, in Zip Loc bags, then digital maps on an electronic device (Android cell phone) w/ waterproof container available and battery bank charger good for 96 hours.