Welcome fan umm a pic is mandatory on the thread 😉
Sounds like your pup is doing well, my puppy went through a phase of doing more wee's in the evening and having more accidents then. I'm not sure what the reason was but I just watched him like a hawk and put him out every 30 mins or so. He's 6 months now and hasn't had this issue for ages.
Re leaving them I think you just have to bite the bullet, it helps if they're used to napping in their crate some of the time. I used to try and time it so I could be fairly sure he'd be tired and sleep.
My puppy seems to be being sick over night, he's done it twice now and it looks a bit like he's been eating stuffing from a soft toy 🙄 I can't work our which one it is though! He also likes eating hair and fluff, weirdo.