Data for Iran is likely untrue, stock market capitalization is around $1.3 Trillion (Ceic data), so according to this graph the GDP is around $250 Billion and in terms of GDP per capita it would be around $2900, far below Iraq where it's over $7000. 2900 is around the average for african countries. The GDP is prob. around 500bn to 700bn.

unfortunately there are different figures that cause confusion, IMF says 2 Trillion but they go by the official exchange rate but the real exchange rate is much worse, but anyway, no way Iran would have a GDP of 2 Trillion anyway, World Bank says 230bn in 2020 which is also ''no way'' territory. UN in 2020 says 940bn, that's more likely but i don't believe Iran's would be higher than Turkey (850bn), both have a similar population, 86.5m in Iran, 85m in Turkey.

World Bank also claimed Iran's GDP PPP in 2020 (Purchase Power Parity) is 5.74x higher than Nominal, at 1.33 Trillion, even in the country with the highest PPP to Nominal Gap, Sudan, it's just 4.85x higher but in Sudan it makes sense as GDP per capita nominal is very low at $920.