For Turkey, election results. For Iran, no hard numbers, just fuzzy memory about articles I've read. What is clear is that the regime has supporters and not just those who benefit directly / materially.
*typo edit
update: Here’s some relatively independent polling from inside Iran which does not corroborate the 50/50 divide. And remember this was taken before the 2026 massacre: https://gamaan.org/2025/08/20/analytical-report-on-iranians-...