Table of content of the 85 chapters in English translations here :

https://88tangeatdrinkread.wordpress.com/2020/02/21/secretly-secretly-but-unable-to-hide-it-%e5%81%b7%e5%81%b7%e8%97%8f%e4%b8%8d%e4%bd%8f-by-zhu-yi-%e7%ab%b9%e5%b7%b2-table-of-content/

There are also additional unofficial chapters that the author penned, one, about the wedding night (rated age 18+) was translated  by MDL member HanyVu  who posted it there:   https://kisskh.at/discussions/hidden-love/108799-book-vs-show  and another about their daughter Musang, with a link to the translation on same Discussion page mentioned here.

Sorry, I haven't spotted one yet.  It may be in the pipeline since Amazon carries the Chinese version of both novel and manhua... and if the drama has enduring and long lasting success with audience clamoring for the novel !   The parts in the translated manhua are very well translated.

Didn't the author post other unofficial chapters?