Why google Not index all pages and how to index multi images in my page in google search ?

when I search for a keyword that I rank for, I see that my competitors have multiple images under these sites and I only have one image indexed
example
when I search for pc gamer Morocco I see that my competitors have several indexed images and my site only has one
my site https://nextlevelpc.ma

 

you can increase crawl bodget here
https://www.google.com/webmasters/tools/settings

 

There can be many reasons and as i am seeing you are using long alt and title with each image, For example your product title is "This product title" and you are using in alt and title of product image "This product title another title and keywords", Seems like you are forcing search engine to index image for multiple keywords and this practice is not good.

 

thank you so much

thank you this link is so helpful