Here is the answer if you are looking for the Wheres Wally Advent Calendar 2019 ODLAW on day 7.
Sneaky Odlaw is trying to escape, but we’ve found him! To be honest yellow and black stripes aren’t exactly subtle.
He is hiding in one of the windows of the castle, on the very right of the advent calendar, almost off of the page! With a giraffe and a teddy bear.