Hi Jessica,
I did some digging on Next Door and found this page that explains how to download content from your agency page into a CSV file. My guess is you would have to upload that data into a spreadsheet or somewhere else for tracking purposes in order to keep track of all your content, links, impressions, etc:
https://help.nextdoor.com/s/article/How-to-download-content-from-your-agency-page?language=en_USI also found this training manual with tips for using Next Door as an agency that may be able to help:
https://medium.com/nextdooragencyresources/nextdoor-for-public-agencies-training-manual-513fdaf7d204