Images are not indexed

[frubini]

I opened a new site with magento2 (CE ver 2.1.7) about 50 days ago but the images are not indexed yet (google webmaster tools - search console): 

Do you know what it blocks the indexing?

thanks

Fabio

[abdukannur]

Same problem here. Did you find any solution? Please share.

[Galanis]

 Same isuue with Magento 2.2.5

[Faten]

Same problem with 2.2.3. Any suggested solution?