A word of caution for new players or those who haven't done this kind of event before:
I would strongly advise AGAINST making any recipes unless asked for...at least until the event ends. The temptation might be there to use the maple leaves since you have them, but what you're collecting now might be needed later when you need to MAKE a recipe as part of a goal. Remember that items crafted before the goal asks for them do not count towards the MAKE step in a goal (though you can still GIVE them). And since we don't know how many of any one recipe we might need to make, the more leaves you have stockpiled, the better.
I can't upload photos apparently, but here's the tasks for Goal 3:
Make 6 pancakes
Make 9 Maple Bacon and Eggs for Lucas
Give 9 Maple Bacon and Eggs to Lucas
Rewards: 130 coins, 28 stars, new kitchen paint
I had the same problem, maybe it's just a glitch for when you start out but the game was really picky for my first collection. I clicked on the trees several times before they gave me my first collection and then the timer showed up. Since then I've learned that the trees are ready to be collected from when they show a tap on the trunk. The timer is set to two hours.
Storm8 knows how to make money (I don't blame them). Since the items are permanent, like the grapes and flowers, buying the gem trees during the event will be a benefit to the player in the long run. I bought the gilded grape vines and gilded flower pots when they were available. I can now harvest more than double the grapes and double the flowers. They are my best sellers. However, 99 gems per tree seems pretty steep to me and I would like to save up gems to use on something besides an event item, even if the event item is permanent. Plus, they just keep adding more and more to keep up with. I'm feeling a little overwhelmed lately.
I'm having the same problem with the trees I planted them this morning and still nothing no timer shows just green leaves fall so annoying I can't start the event till I get a leaf or syrup...
I also faced issues with collecting from maple trees. I agree, they all came ready for collection (taps were present) but no matter what I did (clicking or using the bucket) nothings worked. I tried many times, finally after madly clicking I got my first collection, it was as if it finally was initiated or so. Sadly in my mad clicking I clicked to refill the clock asap so I lost 4 gems :/ So my word is be careful when you try your first collection.