Hi, sorry you've had no replies as yet.
Your LO may well want to feed less often, that's not uncommon at all, but I'd suspect he'd struggle to handle the A times required for a 'standard' 3.5 or 4h EASY - which means you'll need to be a bit creative
. Could you post a recent day or two including when you tried for naps, when he actually slept etc?
Is he an independent sleeper yet?