Has anyone figured out how to indent when using the iPad keyboard?

It would probably depend on which app you are using. Pages has indent, using bluetooth keyboard works by pressing the Tab button.

In notes all I can figure out is to put a space or two at the beginning of each line but in pages if you touch the paintbrush at the top right corner and then list, there's an indent button. In notes sometimes I'll use a – to help delineate the indent.