If you look at the FTDNA data I gathered:
The earliest Urnfield zone is basically identical to Cotofeni into Eastern Otomani-Wietenberg into Gáva: https://bellbeakerblogger.blogspot.com/2015/11/urnfield-radio-carbon-dates-capuzzo-2014.html Proto Urnfield core was further north around Hungary/Slovakia/Poland. That has already been...
www.eupedia.com
You can see that in the Near some of the highest levels of E-V13 are in Lebanon and Syria. Iraq has, with a fairly large sample, still a solid number of at least about 1 % in total, which is about double the number of Iran.
We can therefore say, that the East Mediterranean coast has the highest level, and then it goes: Lebanon-Syria (2) -> Iraq (1) -> Iran (0,5) based on FTDNA numbers. That's the lowest possible number, because a good number of E-V13 carriers of all countries is still just E-M35 or even E-P2 (1st chip FF results). I also don't know, whether for Iran could some distorting factors, like the disproportionate number of AJ testers in countries like Poland, Ukraine etc. Whether some ethnic minorities or the like get more often tested and would distorte the results of ethnic Persians for example. No idea.