It will generate one single sitemap with all your questions. If you want to avoid that and split them in several sitemaps, you will have to use other plugins such as https://github.com/serv2000/q2a-xml-sitemap-plugin.
Note the protocol explicitly limits size to 50000 items per file.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.