All WordPress websites have this. WordPress creates category and archive pages by default.
It does not mean Google will not index your site. Not at all.
If you don’t want Google to index those pages then you need to use an SEO plugin like Yoast SEO or All-in-one SEO Pack
Here is a list of 9 popular SEO plugins.
Please don’t confuse default WordPress functionality with what themes provide.
I hope that answers your questions.
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