Within FAA land a Sidestep manoeuvre exists and is a special case of a circling approach. The ICAO definitions I can find in Doc 8168 say:
Circling approach. An extension of an instrument approach procedure which provides for visual circling of the
aerodrome prior to landing.
It does not specify whether circling means a complete circuit to get to the other side of the runway, or just a brief excursion from the glidepath to line up with a parallel runway. Both are possible. Within this same list of definitions (or the rest of the document), a sidestep is not defined.
I guess both statements are correct. A sidestep is a circling approach, which means that the restriction applies, but you could argue that with the separate definition of a sidestep manoeuvre it allows for something that is different from a 'full' circling approach.