I can find a number of articles on how to get all sites in SharePoint online and everyone referring to the below method
https://docs.microsoft.com/en-us/previous-versions/office/sharepoint-csom/mt779503(v%3Doffice.15)
One of the answers I am looking for is how many maximum number of sites will it return?
My gut feeling says it will not return all and there has to be a specific number.
When I looked at properties of "SPOSitePropertiesEnumerable" object I can see "NextStartIndex" which clearly for next number of sites.
Hope someone can help me here
Edit(2/9) Based on below blog post it should only return 200 sites
https://briantjackett.com/2017/08/23/sharepoint-csom-to-traverse-all-sites-in-sharepoint-online/