Has nothing to do with this. Turkey would love for Azerbaijan to get unified with Iran’s Azeri region (North and South reunion), but the dangers to this Turkic fantasy is that Balkanization of Iran frees up Iranian Kurdistan. This could risk that Iranian Kurdistan, Iraqi Kurdistan, Syrian Kurdistan and Turkey’s Kurdistan all unite to build a Kurdish nation spanning currently across 4 nations and the middle east.
That is the true reason that Turkey doesn’t want Balkanization of Iran, because it could have a domino effect and give rise to a Kurdish nation, something that Turkey has spent decades repressing.