They can all do it, he's already telling you he needs to with those short naps. A lot of the time it can be learned behaviour going down at a particular time.
I used to do something low-key with DD. I used to carry her around for those extra 15mins pointing things out in the house I needed to clean whilst she was asleep
. Sad, I know! Change of scenery worked well later on, such as going outside if the weather was ok.
The key is to stretch them slowly. So 15mins, holding for 3 days then extending again if needs be. A big jump will often result in an OT bubba and that's never fun! OT before BT is a big no-no in this house. Results in multiple NW's in the early part of the night even now. So I'm always wary of stretching the last A. Hth x