156(3) preliminary evidence order challenged

Hello, hope you all are doing good. I have one query and looking for help from this forum. Someone filed a 156(3) application against me for registration of FIR. Ld. Magistrate called for police report. And instead of passing an order for registration of FIR, ld. magistrate asked complainant to provide the preliminary evidence(PE). Complainant has challenged this order in session court u/s 397. Session court issued notice to me for appearance. What options do I have now? Is the order for PE an interim order in this case and it can't be challenged in session court? Please help me with this query ..