Although this issue was authorized by the Niger postal administration, virtually the whole issue was not sold in Niger, but only distributed by the Niger philatelic agency Stamperija for distribution onto the philatelic market. The massive numbers of issues produced obviously were not needed in Niger and it is obvious they were made for profits to the agency from stamp collectors.
This is some sort of scam reproduction of the 2019 UAE joint stamp issue. It was never part of the genuine joint issues. It is another scam Stamperija produced "joint issue" made for the African countries that Stamperija controls at this time who have no interest in the conflict of Palestine. The issues have been hidden by the agency probably due to complaints.