I’m wondering… Can you aquire WTL via hunting traps/fishing traps?
Ctrl+L (or was it Alt+L) opens collectibles interface, in there you can check all your collectibles Progression and Obtainable Rewards when you reach certain milestones.
For World Tree Leaf, at first I though it was continent bound or certain spot drops, but I believe now they’re completely random drops (Like the Legendary Platinum Fields Ticket that I have never ever see before…) and all Trade Skills have their own leaf collectibles