Hi @gaida.leif can you check to see if they are showing in the version history? You can read some more here on how to check this.

If you are still seeing the issue please reach out to the support team directly via this form for help: https://help.figma.com/hc/en-us/requests/new

Be sure to use your Figma account email, share a short video outlining the images which are missing, include the links to your file, and share it with support-share@figma.com so they can take a closer look.