The socket-outlets concerned and "pictured" are "rated" at 10 A.
(I am not sure what you may mean by "all in one".
Your "example" is a bit "old style" - with the "screw heads" protected from contact by individual "covers".)
Each "Socket-Outlet" is controlled by a switch (as in the UK), the Neon indicators are "optional" but are available on a few (more expensive) examples.
Any number of 10 A socket-outlets may be installed on 2.5 mm² conductors and are protected by 16 A or 20 A Circuit Breakers/MCBOs
(Fuses are no longer allowed on new or 'upgraded" installations.)
Other similar (domestic and commercial) socket-outlets, rated at higher current do exist.
These are illustrated in
https://en.wikipedia.org/wiki/AS/NZS_3112 and in
https://commons.wikimedia.org/wiki/...cket_styles_for_different_current_ratings.jpg
Note that any plug can be inserted in a socket-outlet of the same or higher rating, but
not into a socket-outlet with a lower rating.
So, a 10 A plug fits in each of the five types of socket outlet, but a 32 A plug can only be used with a 32 A socket outlet.
(See
http://www.plugsocketmuseum.nl/Australian_3hd.html)
While 15 A socket outlets are often used in domestic situations (cook-tops, ovens and air conditioners) - and in Caravan Parks - very few people in Australia/NZ would have seen a 20 A, 25 A or 32 A socket outlet.
(This may change with the introduction of EVs.)
A 15 A plug cannot be inserted into a 10 A socket-outlet - and so on.
By the way, Schneider (Clipsal) "Australian NZ " style light switches
are available on UK "Wall-Plates" - with
up to 4 switches per wall-plate.
Made of high impact resistant polycarbonate components
www.cef.co.uk
You may note that "Australian/NZ" Light Switches are rated at 10 A.
This is because "Lighting Circuits" in Australia/NZ are rated at 10 A (not 6 A) - using 1 or 1.5 mm² conductors.
Hence it is quite permissible and often done to use a "standard" 10 A surface-mounted Sacket-Outlet (without any
extra individual switch) to supply a light fixture in a roof-space.
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