Greetings! I am Ajibola, and I am eager to assist you with confidence and assertiveness. I guarantee to provide you with exceptional support.
There is no way to change the default section and page that the Notebook tab opens in Teams. The Notebook tab always opens to the first section and page of the team notebook, regardless of where you left off
You can rename or reorder the sections and pages of the team notebook to make the first section and page the most important or useful one for you.
You can create a shortcut or a link to the section and page that you want to open by default and pin it to the tabs bar or the posts tab of the channel. To do this, you can open the team notebook in OneNote for the web or OneNote for the desktop, and copy the URL of the section and page that you want. Then, you can go back to Teams, and use the Website or Link app to create a tab or a post with the URL.
You can use the OneNote app in Teams instead of the Notebook tab to access the team notebook. The OneNote app allows you to see all the sections and pages of the team notebook in a sidebar, and it remembers the last section and page that you visited. To use the OneNote app, you can go to the Apps icon on the left sidebar of Teams, and search for OneNote. Then, you can select the OneNote app and sign in with your Microsoft account. You should see the team notebook under the Shared with Me section.
Note: You might need to translate the page content in the link shared below.
If you have any further questions or need additional assistance, please feel free to ask. I'm here to help!
Give back to the Community. Help the next person with this issue by indicating if this reply solved your problem. Click Yes or No below.
Kind regards.
Ajibola.