I know Wordpress-blog .bubblesite.com is possible but this will not help with domain authority. Google will treat the later as 2 subdomains and its not ideal when getting backlinks. When I say Wordpress-blog basically any external landing pages using AMP or other optimised landing pages. This bog could have 10,000 pages underneath it covering a range of SEO topics.
I did ask this question before and there was another thread too. But I just want to recheck if anyone knows a good solution to achieve this folder structure.
To be more specific, Its better to be answered by the plugin maker, So far i see that the plugin can get the URL from address bar and change to something we provide