Coworker only sees the Notion pages you choose when you connect. This is how Notion works for every app that connects to it, not a Coworker setting. There is no page picker inside Coworker: you pick pages on Notion's own screen, and you change them later from inside Notion.
The good news: you don't have to pick pages one by one. Pick a top-level page and everything nested under it comes along.
Connect Notion and pick your pages
In Coworker, open Settings and click Data Sources.
Find Notion and click Connect. If it says Request to Connect, an admin has to connect it. In the desktop app it says Connect in web app.
Notion opens and asks which pages Coworker can access. Tick the top-level pages you want. Pages nested under them are included.
Click Allow access.
Full connection steps are in How to connect Notion to Coworker.
Add more pages later
You don't need to reconnect. In Notion:
Open the page you want Coworker to see.
Click the ••• menu at the top right, then More.
In the Connections group, click Add connections.
Search for Coworker and pick it.
Pages nested under that page are included too.
Make sure new pages are included
Coworker sees new pages automatically when they are created under a page you already shared. A brand new top-level page is not shared until you add it (steps above).
If your team keeps most docs under one or a few top-level pages per teamspace, share those once and new work is covered from then on.
Good to know
Notion only lists pages you have full access to in its picker. If a page is missing from the list, ask its owner in Notion for full access, or have them share it with Coworker.
Coworker still respects Notion permissions. Sharing a page with Coworker does not show it to people who can't open it in Notion.
If you ask Coworker about a page and it says it can't find it, the page usually exists but hasn't been shared with the Coworker connection. Add it from ••• > More > Add connections.
New pages can take a while to show up in Coworker's answers.
FAQ
Notion is asking me to select pages. Does that mean it isn't connected? No. That screen is Notion asking what Coworker may read. Select your pages, click Allow access, and you're connected.
Can Coworker just search all of my Notion? Not through Notion's standard connection. Notion only allows access to pages you select. Selecting all top-level pages in each section gets you as close as Notion allows.