While 240 (or 220 ) volts is available in some houses it's use is resticted to large appliances which are hard wired to the supply. Portable appliances with plugs are restricted to 110 ( or 120 ) volt supplies.
( source :- friends living now in the USA and personal experience during visits to the USA )
While
some "large appliances" in North America (which includes Canada)
are required to have their connection to a 240 V supply to be "hard wired", this is
not true for all appliances/devices for which 240 V is required.
Also, the requirement for any connection being via "hard wired" or a "socket-outlet" can vary between jurisdictions (Country, State, City, County etc.)
In addition, while there is a US NationaL Electrical Code (NEC) and a Canadian Electrical Code (CEC), various jurisdictions (manly in the US) can "run" on "codes" which are not the latest for many years.
I draw your attention to
https://en.wikipedia.org/wiki/NEMA_connector#/media/File:NEMA_simplified_pins.svg, which shows to "connectors" currently supplied by members of the (US) National Electrical Manufactures Association (NEMA).
You will note that there are 11 such connectors which are available to supply 240 V, sometimes with a Neutral so that 120 V may also be supplied, sometimes with a Ground/Earth and sometimes with both - a currents of between 15 A and 50 A
(While it may be that socket outlets without a Ground/Earth connection are now not permitted to be
newly installed in many/all jurisdictions, I cannot assert that.)
While not necessarily "portable", you should note that some of these socket-outlets are designed to supply devices such as "Clothes Dryers", "Electric Ovens", "Welders" or "Plasma Cutters". Not shown there is the current need for North American socket outlets to supply 240 V for the chargers of electric cars.
You should also note that there are many discussions concerning the installation of 240 V socket outlets in North American "garages" etc. on sites such as
https://www.diychatroom.com/f18/
In contrast with the "mess" that is the North American complex of incompatible socket outlets and plugs for connecting devices to various "dual" voltage supplies at various maximum currents, please observe the simplicity of the Australian/New Zealand situation, where the "Standard" 230 V can be obtained from any "normal" outlet ranging from 10 A to 32 A.
In Australia/New Zealand (using a 230 V supply), most "domestic" devices are equipped with a "10 A" plug, which may be inserted into any socket outlet, up to those supplying 32 A.
"15 A" plugs may do the same , BUT they cannot be inserted into a 10 A socket - and so on.
(Since any Circuit Breaker/Fuse is there to protect only the wiring [and not any device connected], this is completely logical!)
Actually, most persons in Australia/New Zealand would never have seen anything of larger capacity than a 230 V, 15 A plug/socket combination, since they are largely unnecessary, except for Industrial Applications. (However, the use of Electric Vehicles may change this.)
(See
http://www.plugsocketmuseum.nl/Australian_3hd.html for an illustration of these socket outlets - but note that the 20 A outlet has been omitted on that page.)