She sure looks like she's laying with that redred comb.She's in the middle.
Yes, check her pelvic spacing, I go by the F-F spacing.
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
Oh, and....Welcome to BYC! @missalline
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical location to your profile.
It's easy to do, and then it's always there!