Does a canonical tag non-index you from Google

Hey everyone,

I'm trying to target multiple locations. So by doing that I have created loads of pages with similar content (enough to be duplicates) and changing the main keywords to each location.

I'm currently using a Canonical Tag in Yoast SEO by pointing the URL back to the URL it's currently on if that makes sense? so if it's builders in Scotland the canonical tag will be builders-in-scotland and then each locations page will point the URL to it's location.

I've just looked and it has non-indexed the 80+ pages I have built out. Am I using the tags wrong?

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Thanks.