Resolving Notion and Dust Connection Issues: Seeking Assistance

Hello all ! I have a few issues when connecting Notion to Dust, happy if I could have some help : The documents are not correctly indexed. I have 3k+ Items and I cannot select a Master document where an agent can search directly (e.g., an agent that goes on the Product folder or a sub-folder in the Product master). Any idea how to solve this issue ? Thanks !