Is it permissible to explain the Jumu'ah prayer before the Adhan, and what is the ruling regarding some scholars' objection to the presence of two sermons for the Jumu'ah prayer?

Teaching before the Friday Adhan (definition) is permissible, and this is supported by the Hadith (definition) of Abu Hurairah (may Allah be pleased with him). The permissibility of teaching is conditioned on the lesson or translation being unified, and people sitting in their rows, ready for Jumu'ah (Friday prayer). If there are multiple circles for translation or teaching, it is disliked (makrooh) due to it causing the disruption of the rows. The Imam should be advised wisely and in private.