Empty name tag for images

I have a blog on website: https://aust-fotografie.de/magazin
And I show all posts using the "recent posts" item. It shows the title and the title image. But I now found that the title image has no name/linktext and this messes with my SEO ranking for the page.

Is there any way that I can add a linktext/name/title to the title image of my blogposts so that this is used when using the "recent posts" overview?

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