“Lost” Jewish communities frequently pop up in strange places, and the more so since DNA testing can shed light on the matter. There is no indication that any of them are connected to the ten shevatim that “disappeared” after the Assyrians trashed Eretz Yisrael. In all fairness, any of them who were so inclined could have linked up with the large Jewish community in Bavel the came into existence shortly afterwards, and lasted until the mid-20th century. You can’t be “lost” when there were well established Jewish communities in the neighborhood.
All Muslims follow many Jewish minhagim since they copied them from us. Any virtually everyone is a “mash up” of DNAs so you really can’t connect anyone from today to someone to 2000 years ago based solely on genetics. The Pahtuns have all sorts of dubious legends, but clearly appear to be Aryan (not Semitic) linguistically, with strong connection to Iran and the Indian subcontinent.