See these discussions:

https://www.researchgate.net/post/Publishing-in-predatory-journals

https://www.researchgate.net/post/New_very_misleading_type_of_scam_Anyone_with_recent_examples

https://www.researchgate.net/post/How_to_recognise_predatory_journals

https://www.researchgate.net/post/How_can_I_check_for_predatory_journals

https://www.researchgate.net/post/How_to_know_about_predatory_journals

https://www.researchgate.net/post/How_to_spot_the_predatory_journal

https://www.researchgate.net/post/What_are_predatory_journals_How_to_find_them_Are_the_articles_published_in_them_considered

https://www.researchgate.net/post/How_to_identify_a_predatory_journal

https://www.researchgate.net/post/What_are_predatory_journals_and_how_can_they_be_detected_How_do_you_detect_citations_from_previous_journals

https://www.researchgate.net/post/What_is_a_predatory_journal2

https://www.researchgate.net/post/What_is_the_accuracy_level_of_Bealls_efforts_https_beallslistnet_in_tracking_predatory_journals_across_the_world

https://www.researchgate.net/post/What_do_you_understand_by_the_term_Predatory_journals_and_publishers

https://www.researchgate.net/post/What_are_your_thoughts_on_measures_to_curb_predatory_journals_in_the_academia

https://www.researchgate.net/post/How_do_you_make_sure_of_the_sobriety_of_the_scientific_journal_and_that_it_is_not_predatory

https://www.researchgate.net/post/Are_you_serving_predatory_journals_as_a_peer-reviewer_or_editor

https://www.researchgate.net/post/Is-there-a-public-and-universally-accepted-list-of-predatory-journals

https://www.researchgate.net/post/List_of_Predatory_Journals_2019

https://www.researchgate.net/post/List_of_Predatory_Journals_and_Publishers_2020

https://www.researchgate.net/post/List_of_Predatory_Journals_Journal_Indexed_by_Scopus_and_Scopus_Discontinued_April_2021

Publishing in predatory journals is not much worth as the review process is not rigorous. They are more interested in publication fee rather than contents of the paper.

Predatory publishing is a scourge threatening the sanctity of scientific dissemination. Recent relevant reads are the articles by Demir (2018), Macháček and Srholec (2021). Both papers have cautioned against predators and rendered tips.

Demir, S. B. (2018). Predatory journals: Who publishes in them and why? Journal of Informetrics, 12(4), 1296–1311. https://doi.org/10.1016/j.joi.2018.10.008

Macháček, V., & Srholec, M. (2021). Predatory publishing in Scopus: Evidence on cross-country differences. Scientometrics, 126(3), 1897–1921. https://doi.org/10.1007/s11192-020-03852-4

Regards,

Is there any way to report these journals to the concerned authorities ?

Well there are always two sides of a coin. If there is a workforce, we just need to streamline their efforts and allow them to regulate to work till a certain threshold. I am not an advocate for predatory journal, but what I am trying to say is that we can use this workforce and after assessment and regularization from concerned scientific authorities, let them work in a specific category for specific type of literature with limited allowance of finances. Eventually those who want to publish in reputable journals can acces them and those who knew their work quality will publish in these lower categorized journals.

So you mean predatory journals are for newbies or bad researchers and peer-reviewed journals are for good researchers or established researchers ?