No, you are probably talking about Hamas Yasin-105Is it Kornet that pre-explodes a small charge to defeat active armor first before detonating the main charge?
That's a glorified RPG with tandem charge, Kornet is a different beast
Idea behind dual launch Kornet (with 5-6km range) is to defeat Trophy APS. Trophy reload takes 1.5 seconds, so if you launch second ATGM <1.5 seconds after the first one, the second one can avoid Trophy APS and is almost guaranteed to hit the tank (see video below where second ATGM is launched <1 second after the first one)
Hamas tries the same with dual launch RPGs, but less successful due to heavy armour of Merkava and weak warhead of RPG