I didn't see any images there.

I find the link

https://www.mssqltips.com/sqlservertip/2605/sql-server-reporting-services-image-source-report-options/

It showing the images will be stored in 3 ways.

In that case the images tab that we check from .RDL is embedded images. So I think there is no embed images for this report but I am not sure about the external images we might have any!