There is little point submitting sitemaps unless:
a) There are some parts of your site that you want including but a bot is likely to miss (i.e. they are not directly or indirectly linked to the landing page of the site).
b) You want to give the relative priorities of the web pages, to influence what ls listed in search results.
Scenario a) is somewhat unlikely (why would you hide pages if you wanted them to be publicly accessible?). Scenario b) is the usual reason for submitting site maps, but requires you to manually amend, and maintain, the site maps. So just creating an automated site map and uploading it is a waste of time.