There is a certain like tree stump in vagulro that gives you a bit of sap and there is also a fuzzy, furry looking tree in the desert that you harvest for sap. Yes you can use the redwood tree taps but those take ages to start producing sap so this is a quick way to get some sap I don’t think this is on ark mobile though
In the swamp (in Ragnarok for me at least) i found a really big tree which you can't harvest, and you can collect sap from it. Very useful for me as i don't want to go to the redwoods. I think it was very useful!!!
Btw, the tree is on the northern side of the swamp in Ragnarok, it is surrounded by ruins of some kind, you can't really miss it. But maybe more trees can be used, havent checked
Each tap has a max of 30 sap at a time, so 120 per platform. Place a bed and storage box so you can fast travel every now and then to put the sap into storage. This way you’ll be able to grab hundreds every time you fly out to gather it