@Sarah Gooding
Seems like you didn't work with Elementor and Elementor Pro before?

The access to Headers, Footers etc. is not restricted at all!
The Theme has a header and footer like a regular theme.

The Header, Footer etc. feature is Elementor's Theme Builder - template based and completely optional. Hello theme is just fully compatible with it out of the box.
This template builder is only available with Elementor Pro. But the theme can be fully used without it and even without Elementor itself.
But once you have Elementor Pro active, you have access to pre-built Header and Footer templates for this Theme Builder.

This should be updated in the post - since as of now this appears totally confusing.