Please note that ResearchGate is not a publisher (see "Is ResearchGate a publisher?" in https://help.researchgate.net/hc/en-us/articles/14292596164753). By uploading your thesis here, you made it available to readers, but this is not regarded as a publication. The best solution is to publish papers with the results of your research. You may also try to make a book from your thesis, but this is difficult. Be warned of "predatory" publishers who just take your money for publication. See also:

https://www.researchgate.net/post/I_have_submitted_my_thesis_the_question_is_can_I_published_the_chapter_of_my_theis_in_any_journal/1

https://www.researchgate.net/post/Publishing-your-thesis-as-a-book-and-also-publish-journal-articles/1

https://www.researchgate.net/post/How-to-turn-a-dissertation-into-a-book/1

https://www.researchgate.net/post/How_does_a_thesis_convert_into_a_book/1

https://www.researchgate.net/post/Which_is_the_best_publisher_to_publish_the_PhD_thesis/1

https://www.researchgate.net/post/I_want_to_publish_my_thesis_as_a_book_What_authentic_publishing_houses_do_you_recommend/1

https://www.researchgate.net/post/Who_can_provide_information_on_available_free_of_charge_academic_book_publishers_where_I_can_publish_my_dissertation/1

https://www.researchgate.net/post/Opinion-required-on-Lambert-Academic-Publication-is-it-okay-to-publish-thesis-through-them/1

https://www.researchgate.net/post/Research_publication-publications_of_papers_from_my_DBA_thesis/1

Thank you Wolfgang R. Dick