macOS keyboard shortcut for correcting misspelled words?
Solution 1:
You can't correct them in a single click, but you can make it start to go though them in bulk, correcting each on the way.
Cmd ⌘ : [which on a UK keyboard is actually Cmd ⌘ Shift ⇧ ; ] will pop up the Spelling & Grammar checker, allowing you to select each error in turn & correct it [or ignore, learn etc]
Alternatively ... Edit Menu > Spelling and Grammar > Show Spelling and Grammar