Currently seems bugged in the beta as of 2020-08-11. If you run around the Heart of the Forest you'll suddenly learn to craft three items: Dyed Runestag Leather, Runestag Leather Strap, and Stalker's Leather Quiver. While the quest gives no indication of where to get any of the materials --- all of which are marked as quest items --- they seem to stem from a basket next to Yannsa the Trade Goods vendor. However, she's too far away from the quest objective and whenever I get to the basket I'm no longer able to interact with it as a quest objective.
I've managed to get the reagents by repeatedly running towards the supplies and hoping they'll remain long enough for me to loot. After about 20 minutes I managed to get them --- but now the item to craft is no longer listed in my leatherworking log. I intend to run around the Heart of the Forest for a while to see if I'll eventually learn to craft the items again.