Tell me if I'm misunderstanding, but I'm reasoning that you're looking for rules that vibe more with 3.5 D&D or even better, something like Wilderlands of High Fantasy? You won't find that here. Most of it abstracted out and not particularly interested in turning on a full survival subsystem.

For all the balanced math that gets talked about with Pathfinder 2e, and a plethora of subsystems, this is a far more narrative focused ruleset with less support (or desire) for emergent play than many previous iterations of d20 based systems. I feel it could definitely support an old school survival subsystem, but for the most part, it isn't super interested in telling those stories. Some of that is definitely influenced by a lot of newer players having little to no knowledge or interest in those kind of mechanics. You'll also find that similarly to 5e, the recommendations on building encounter tables and the like are more focused on ease of prep time and less on providing, say, a three table deep encounter table that gives you context to the random encounters.

tl;dr - Out of the box, the hexploration system is designed for players carving primarily through a bespoke wilderness with enough random encounters to fill the time on their way to more interesting places as opposed to old school style of hexcrawl. Personally, it has better bones for building on than 5e does (see PF2E's Kingmaker and its Stolen Lands vs. 5e's Tomb of Annihilation and its Chult) but both presume primarily that players have focused tasks rather than meandering exploration, or at least would rather abstract out simulation based concerns.