Improve the SEO score based on suggested improvements from SmartCrawl

We have tried to improve the SEO score of the site based on the SEO checkup report.

One of the suggestions is
URL Structure: keywords but this is a one page site, is there a way to fix this?

Label Duplicate ARIA Landmarks there is a form from Gravity Forms, is it possible to fix this one too?

We would appreciate if you could provide more guidance on the other elements too.

Thanks in advance!