So just to start with there is no "sync between" them so hence why (I assume you are asking for help in doing it using PA).
You have to specifically do one of 2 things
1. Update the when an item or file is modified trigger in SharePoint (assuming the excel is there) , for instance.
2. Then when you make changes and save, it will trigger the flow
3. Pull back the rows you want to be used in the OneNote update/append.
You will either use Filter Array to get the rows you want, or you will use some Filter criteria in the Excel List Rows in a Table action
4. In the flow you will use the Create HTML Table action from the rows you got back from Step 3
Since you didn't explain format within OneNote etc I am making an assumption here.
5. You will then use the OneNote Action you need (depending on what you are doing), (adding or updating content will decide if you are appending or updating page content).
That or you will use a scheduled flow that runs, 1 time a day???
To do everything i said above, just your trigger is different.
If these suggestions help resolve your issue, Please consider Marking the answer as such and also maybe a like.
Thank you!
Sincerely, Michael Gernaey