Man pages matching name mongoc_index_opt_wt_init in section 3:

mongoc_index_opt_wt_init.3.en	debian 10 / libmongoc-doc
mongoc_index_opt_wt_init.3.en	debian 11 / libmongoc-doc
mongoc_index_opt_wt_init.3.en	debian 12 / libmongoc-doc