Not sure whether to be concerned.
I have a 7 week old and she slept from 12:30am till 7:30 am then woke up for a bottle and then slept till 11am, I went to change her nappy and she hadn’t done a wee, but the weed all over me. She hadn’t had a wet Bally for 11 hours. Since then she has had loads of wet nappies.