Press F10, and small letters appear over each ribbon tab and quick access toolbar item. Alt+H takes you to the Home tab, Alt+N to Insert, and so on. Once in a tab, additional letters appear for ...

This will make the original row of function keys appear on the Touch Bar, including the Escape key if your Mac doesn't have a physical one.

Learn about 10 Text functions in Excel with examples, including Find, Len, Left, Right, Mid, Substitute, Upper, Trim, Concatenate, and Text.