[NSFW] 2 sitemaps

You need to create a parent sitemap to include them two. And use that new sitemap into settings.

https://adultforum.gr/sitemap_index.xml
https://adultforum.gr/escortsforum/sitemap.xml
these are the 2 sitemap indexes, how can I create a parent sitemap and include them ? Is the first time i hear about it.
Thank you for your patience and help.

you need to manually create a sitemap file , with link to these 2 sitemap files

open one of these sitemap , view source code , copy it out , modify the source code to your 2 sitemaps

then save it into a xml file and put it on your server , that’s it