Ask the builder to give each important public page a clear title, useful description, descriptive heading and content that answers the visitor's question. Use the words your customers use naturally in the page; a list of keywords is not a substitute for useful content.
Make a focused change
For example: Check the title, description and main heading on my services page. Make it clear that this business repairs bicycles in Bristol. Leave the rest of the app alone.
Ask for a canonical URL that matches the address you want people to use. If you need a sitemap or structured data, describe the real pages and facts it should represent. Do not ask the builder to invent ratings, reviews or other evidence.
Publish and verify
Check the live page's HTML and links after publishing. Rendering can differ between apps and routes; do not assume that seeing content in your own browser proves that a crawler receives it. Use Google's inspection tools for the actual published URL and resolve any blocked, missing or private pages.
For local businesses, keep the business's location and services accurate on its public pages and its own business listing. No title, keyword, custom domain or SEO tool guarantees a search position.
Does SEO work use credits?
An SEO review or enhancement that sends a prompt to the builder is a billed builder turn. Changes to the page use credits like other changes. Work through the relevant findings rather than asking it to apply an entire audit without checking what each item means.
See Google's SEO starter guide and Changing your app's sharing image.