our son was TT during the day within a week of starting him on the toilet when he was 2.5yo, and then about 2mths later he was TT for nights as well.
We tried the pull ups during the day, but found he wasnt getting them off quick enough to wee in the toilet, so we went from nappies straight to jocks really.
We only did the night TT by mistake really-my Partner put our son to bed and forgot to put his pull ups on, so when i got him dressed in the morning we realised he'd gone all night with no accidents i just his jocks.
We praised him like he'd cured all the diseases in the world that morning! lol
We put him to bed the next night in just his jocks and he was dry again, continued the same praising and have done ever since.
5mths later still no accidents at night time-we always remind him to go to the toilet before bed though, even if he says no, we make him and sure enough he goes!
But his night TT was just from our forgetfulness really! lol
We never restrict his fluid intake though-he's so active, he'd be dehydrated if we stopped him drinking 1-2hrs before bed like some people say/do.
Have u tried using a rewards chart (no accidents = him putting star on wall), or making a massively over the top big deal when he is dry to boost his confidence, or trying the "you're a big boy now, no dummy or nappies etc"??
Kids will do it in their own time, so i wouldn't worry if he's not TT at night just yet, you're half way there so well done!