SEO and GEO share a kitchen. They do not share a scoreboard. If an agency cannot tell you which job an hour of work was for, they are billing confusion.
SEO
Crawl, index, rank, click. The unit is a page. The prize is a link in a list. You still need this if you want the website itself to work as a website.
GEO
Retrieve, resolve, emit. The unit is an entity. The prize is a sentence that does not invent a second company. A public file helps the resolve step. It does not buy the sentence.
The honest boundary
Do SEO on the domain you own. Do identity on a file you can point at. Measure mentions if you want a meter. Do not let the meter become the product.
Read why this exists. Check a name in the registry. Or start with a free check. Gold is $297 a year after the website is proved.