Having problem with image alt text

Hello everyone, I am new in SEO. Here is my blog about Anime Review

The problem is the image alt text. I have added alt text using blogger tools. But when I use bing webmaster. It told be that, No image alt text but there is image alt text. I tried other website audit, and got the same result.

I forgot the other website audit that I have used, But it told me that I was using google standard in image alt text. Would it have an impact in SEO?

Half of the images have alt=‘’ with no text inside the attribute. Perhaps those are the ones it is complaining about.

Those images almost certainly either need some actual text so that blind people can hear what the image is OR if they are purely decorative they should be moved to the CSS.