For example, A new line stability index for voltage stability analysis based on line loading, DOI: 10.14744/cetj.2023.0004, https://cetj.yildiz.edu.tr/storage/upload/pdfs/1683271957-en.pdf
This is a a frequently asked question. See my reply to this question and the links to more discussions about this problem therein: https://www.researchgate.net/post/Why_my_h_index_not_showing_and_my_citation_is_also_not_showing
Dear Salah Mokred It is in this case, as indicated by Wolfgang R. Dick, because the journal that cited one of your papers is not listed in RG database of journal titles (the journal is too new and just started volume 1, issue 1).
What you can try to 'speed things up' is that you could ask one of the authors https://www.researchgate.net/profile/Kadir-Dogansahin-2 to upload the paper and then most likely the reference (and thereby your citation) will be picked up.