Yes and no (things are far more complex).
Sockets (regardless of the country) have three contacts since many, many years, live, neutral and ground/earth.
Plugs can have 2 or 3 contacts, either only live and neutral or also ground.
The UK (and a few other countries) have a standard where live and neutral have a position (and there is even a fuse on the live inside the plug), rest of the world mainly can invert them.
Low power and Class II (or double insulation) devices are allowed to be not connected to ground, hence the only two contacts in the rest of the world, that is sometimes replicated in the UK with the third contact made of plastic (the UK socket though more complicated than many other countries ones, are very secure, the third prong is needed as it operates a mechanical latch allowing the other two to make contact)
EU sockets are designed mainly to accept two types of plugs, the type C (two pins) designed for max 2.5 A, often called “Europlug” and type G (two pins + earth) often called “Schuko” designed for 16A..
Mikrotik devices such as the Ax2 being “low power” normally have a type C “Europlug”.
Italy and France (only as an example) have slightly different sockets that can anyway accept the “Europlug”.
There are anyway adapters to convert anything to anything else.
About that device you linked to it has explicitly the code RBC52IG-5HAXD2HAX-UK that is a “normal” (non-US) device BUT with a type G plug for the UK, compare the UK version:
https://www.senetic.co.uk/product/C52iG-5HaxD2HaxD-TC
against the (say) Polish one:
https://www.senetic.pl/product/C52IG-5HAXD2HAXD-TC
by the same distributor/reseller.
You can get the UK one and either replace the power brick or use an adapter/converter for the plug.