Power Point's text formatting is not as elaborate as Word's.
You can use carriage returns (ENTER) & soft line breaks. (SHIFT+ENTER)
Soft line breaks create a new line but text is still part of the "paragraph", which is where indents, etc. are controlled.
Are you viewing the Ruler? Turn it on and you should be able to control indents (more or less) that way. You may need to "fake it" with tabs & tab stops.
You can also create multiple text boxes on a slide. Clunky but it works.
However, keep in mind that cramming too much text onto a slide is very poor presentation design. The slide should not be a written document of your ideas. The slide should be a few key points to help you (and your audience) remember your ideas.