Can we copyright an idea or concept?
Copyright is an official right to control the distribution, copying, and alteration of original works of authorship. And works must be fixed in a tangible form.
The law on copyright deals with original intellectual creation in the ‘literary, scientific, and artistic domain, whatever the mode or form of its expression’ (Article 2(1) of the convention.

Freger Reyes claims that his seven-year-old photo concept has been stolen by Geoge Tapan.
Under the law on copyright, if the concept of two photographs are similar is not enough to be in violation of copyright. Anyone cannot copyright a concept for a photograph. Ideas are not protected subject matter. It must be fixed in a medium.
I think there is no legal basis for the allegation made by Freger Rayes through his Facebook post. Because he says his concept has been stolen not work but we know that concept is not protected by copyright law without any tangible medium of expression.