I cannot believe that some people have no grasp of British history.
The wife of the King is always the Queen Consort known as the Queen for short. Queen Consort is to differentiate between Q Consort (married to king) & Queen regnant (Queen in her own right). It’s not tactless.
I have to admit I'm shocked at lack of historical knowledge - but I think many posters aren't British.
Inheritance laws made Queen regnant rare - first undisputed one was Mary I which explains why Henry VIII was so desperate for a son. Prior to that we had the The Anarchy - .
So it's been Queen Mary I, Elizabeth I - next one Mary II who ruled with her cousin ( and after her sister in succession anyway ) and husband William III, then Queen Ann then Queen Victoria and then Elizabeth II.
Prior to Stuart inheritance of English crown they only really had Mary Queen of Scots as Queen regnant and possible Margaret, Maid of Norway never inaugurated and whose death sparked a succession dispute.
France had Salic law - no female inheritance and Hanover had semi-Salic law which was why Queen Victoria didn't get that as well as English crown.
A thousand year old monarchy does come with some outdated notions and succession laws have only just been update with Succession to the Crown Act 2013 leaving it to birth order alone now no longer favoring boys.
Charles wife was always going to be Queen - a Queen Consort - though I do think there may have been PR games in early years of their marriage when papers suggested she wouldn't use title.