Solution:
You can try using export-all-urls plugin. Below links will help you export the URLs.
https://wordpress.org/plugins/export-all-urls/ https://www.greengeeks.com/tutorials/article/how-to-export-wordpress-urls-to-text-or-csv-files/
If you have a pattern in the existing URLs, then you might not have to add rewrite rule for each and every URL. Instead use regex to map all URLs following the pattern to AEM URLs.