If the publication page was not created by you, it is still available in researchGate, but not longer attached to your profile. Search for the title in https://www.researchgate.net/search.Search.html?query=&type=publication and confirm authorship (click on "More" for the menu - see "How do I confirm authorship of my publications to add them to my profile?" in https://help.researchgate.net/hc/en-us/articles/14293005132305-How-to-add-research). - See also the section "Why are there duplicate research items on my profile?" in the help page https://help.researchgate.net/hc/en-us/articles/14293081125777-Reviewing-editing-and-featuring-your-research to get instructions how to merge two or more entries.

Thank you, I really appreciate your answer

I found that it was not deleted, only the article that I intended to remove

I am ever so grateful