My dog Sydney (not a Yorkie) went through this. When she was little ( around 12 weeks if I remember) she would pee and just go back to sleep in it . BUT we got her from a pet shop , so I assume she was use to just going in her cage. I got smaller and smaller crates but nothing worked. She could have cared less about sleeping in her pee. So I got a bigger crate because I figured atleast maybe she wouldn't lay in it
Maybe you can put a pee pad in the back so she can use that at night...until she gets trained.
I stopped water after 7 p.m. and I took her out EVERY 3 three hours day and night ( I realize you probably can't if you work outside the home because you need to sleep
) For almost 6 months until she caught on then I went longer between the hours. And when she didn't pee in the crate and did go outside I made a BIG deal of it with praise and treats ( I'm sure some of my neighbors still think I am a nut for being outside at 3 a.m. jumping around and singing a good pee-pee song
)
She now will hold it all day if she had to , and all night till atleast 7 am. and her last out is 9 pm.