Try with Google operators to find what you looking for. Google this allintitle: =christian directories.
A couple things. Submitting to directories is not going to do any good to your blog. Directories are a thing of the past. Secondly, and I am sure you're already doing this, social media is what you should concentrate on. Twitter is hot now (Musk's taking it over has been incredibly beneficial to it, their servers are about to melt). How's your twitter following? Do you have a facebook group? Do you submit your content to facebook groups? How strong is your insta and pinterest presence? That's what you need to concentrate on.