Ask where it says that
Google's own guidance tells site owners to check a third party's recommendations against official Google guidance, and to look at whether the advice cites Google's documentation as evidence. That's a question you can ask on a sales call, and the answer tells you a lot.
Somebody who works from Google's documentation can send you a link in a minute. Somebody working from a checklist they inherited will tell you it's proprietary, or explain that Google doesn't publish the real rules, which is its own kind of answer.
The four claims that don't survive a check
A promised position on Google. Google says plainly there's no way to request or pay for a better local ranking, and its own guide on hiring help warns about anyone who offers one.
A submission service. There's no form to submit your site to hundreds of search engines, the sitemap ping endpoint was retired years ago, and the tool that promises instant indexing is using an interface Google supports for job postings and livestreams only.
A monthly directory sync, which is an afternoon of work billed forever, and a schedule of generic blog posts, which is the shape Google's own guidance warns about when it describes content that recycles what everybody has already said.
What a good proposal has in it
The towns you'd be found in, named. The jobs, named. What gets written and how many pages of it. Who owns the website and the web address at the end. What happens to the pages if you stop paying. And what they'd show you every month.
A proposal that's mostly adjectives, with the deliverable described as optimization, is a proposal you can't check later. Ask what physically exists on the site in ninety days that doesn't exist today.
How to check it yourself, monthly
Search Console is free, it's your data, and it should be in your name rather than in theirs. It tells you which of your pages Google has, what searches you came up for, and whether that list is growing.
Then do the search a customer would do, from a private window, for a job and a town you're paying to be found in. Between those two, you can check most of what anybody tells you without buying a tool of your own or learning a word of the vocabulary.