The issue here is that your file might not be with Kitchener IRCC just because you live in Kitchener. My friend here in Kitchener who applied in Dec 2022 just received test invite 2weeks back and the test came from Mississauga. What I understand is that some folks in Kitchener have their files with the Niagara office and Niagara redistributed the load to Mississauga and Scarborough recently. Before shooting Kitchener IRCC an email, I recommend calling IRCC call centre to confirm the exact office your file is at.Thanks!
I will try calling or sending an email. It will be 4 months tomorrow since BG verification. It’s quite annoying.