 NEW YORK--BUSINESS WIRE--WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of the securities of Yalla Group Limited NYSE: YALA between September 30, 2020 and August 9, 2021, inclusive the Class Period, of the important October 12, 2021 lead plaintiff deadline. SO WHAT: If you purchased Yalla securities during the Class Period you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement. WHAT TO DO N 