Is there such a thing as a "standard" GEO services package yet?

Every GEO agency seems to have a different definition of what they do.

Some sell AI content optimization.
Others focus on entity SEO, schema, digital PR, AI citations, or technical SEO.

If a business hired a GEO agency today, what deliverables should they realistically expect to receive?

I'd love to hear how agencies, consultants, and in-house SEOs define a complete GEO package.