Hi there
I agree with pps suggestion of making the first nap a bit later - thanks VnessMorris for paying it forward with your support

A couple of things to add.
EW is really when a LO has less than 10hrs sleep so whilst we might all like to have LOs with a full 12hr night sleep it isn't really considered a problem unless it drops to below 10hrs and/or LO is clearly not well rested.
If your LO seems fully rested then it's likely he only needs 10.5 to 11hr night sleep rather than 12hr. Some LOs never do the desired 12hr night (mine included), they just can't, but they can still be fully rested with the night sleep and naps. It looks like your LO is getting enough sleep overall.
If your LO used to do a full 12hr night it may be possible to get that back by capping one of the naps as you said. Some LOs do very well with a capped nap and the night lengthens. Some however really need the sleep spread over the day and might be very unhappy and not so well rested on a shorter nap even with the option of sleeping longer at night. It would take a bit of experimentation and each time you change something you would need to wait a while to see how it settled down.
If you want to cap one of the naps maybe think about capping nap 1 by moving it later but ending it at the same time? So rather than a 2hr nap 9am - 11am you do 9.15 - 11, then 9.30 - 11, then 9.45 - 11 etc. Each shift you can wait a few days to see how the morning WU time has been effected. It doesn't have to be this nap that is capped of course, the other option would be to move nap 1 later and then cap nap 2.
If your LO has never, or rarely, done 12hr nights as a standard part of his routine then I'd suggest you accept the night length and instead move the entire routine on by an hour making all naps and meal times later by one hour and BT would be 8pm rather than 7pm. I'd suggest shifting 15 mins per day over 4 days (or slower 15 mins every other day over 8 days) until you achieve the shift - this would mean LO gets exactly the same length naps and nights but it all happens later and get the WU time you are happier with.
hope this helps