The closest thing to Yoast and Rank Math is the in-house Webflow Audit tool and using that to edit your headings, images and other items. You should also use this link: https://pagespeed.web.dev/ Hope it helps :)

1. Add SEO titles and meta descriptions to all pages 2. Provide alt texts for all images 3. Set up proper URL structures 4. Use proper header tags like cuphead 5. Check your website navigation 6. Connect Google Search Console 7. Check advanced publishing options 8. Connect Google Analytics 9. Structure your blog posts for SEO success