Your list is much longer than mine. I have no intention of doing a global trip like you are, but realistically once you go over about 1,000 miles (1,500 km), your global list is not much different than the list for your first thousand miles. A lot of things that you might not need for 3 months, you might be better off buying them later instead of carrying them the whole way. If you lay out all your stuff and then look at it and say, what should I take out to reduce this by 5kg? Pretty soon you get to the point where you are down to only the important stuff.

For the first couple months, check your cleat bolts every few weeks. The shoe sole is plastic, it deforms under the pressure of the cleat, the cleat screws then loosen. If a cleat bolt gets too loose or falls out, you can't uncleat your shoe.

Buy a spare cleat bolt, on my Nomad I store my spare cleat bolt (and one other M5 bolt) threaded into the bottle generator tab on the front fork. Hopefully the bolts will stay there forever because hopefully I will never need them.

I should have mentioned this when you asked about tools but forgot too. Some thin plastic disposable gloves like medical personnel use can come in really handy if you have to do a repair with a messy bike, especially if you have to handle the chain. I carry maybe a half dozen pair. Discard them after one use.

I weighed all of my camping and biking gear, put it in a spreadsheet. When I plan what to bring on a trip, I can assess the weight while doing that. I also can compare weights of different things that can substitute for each other to decide which to leave home and which to take.

Is your Whisperlight the model that can burn kerosene? (Maybe you know of the fuel as paraffin or petrol?)

On my last trip, I forgot the cork screw. That caused a delay in the trip while looking for one in several stores. And when I found one, it was heavier than I really wanted but by then I was not picky. (Yes, that is a 1.5 liter bottle.)