Instead of typing a period at the end of each sentence and follow by a space, you can double-tap the space bar, or tap once with two fingers, to get the same result.
Ironically the iPad soft keyboard doesn’t have a Tab key, but you can tap the space bar with three fingers at the same time to get three spaces, or four fingers to get four spaces. It works for five spaces too if you put five fingers together to press the space bar 🙂