Yes, to me it looks like it’s public right of way.
The picture doesn’t really show what the object is… if it’s a fire alarm box, and not something else (like an LFL), you might have different results with a picture that more clearly shows what it is. That MIGHT fall under emergency operations.
I am assuming that these are no longer in use and it is here for decorative purposes, obviously local reviewers would be able to confirm this.
The only reason I can see for the rejection is the SFPRP / public area argument.
Being in the UK it seems strange to me that the side walk / pavement may be classed as part of the private property as that is not the case in the UK but I am aware that it is the case in some areas of the world.
If that is the case here then my only suggestion is that the OP needs evidence to prove it. Boundary maps etc.