Right now it's impossible to exchange your fiat to crypto in iran. It doesn't matter what exchange you use, whether it's bisq or whatever, you have to somehow give them fiat, so they give you bitcoin. Iran is under complete banking sanction. There is no connection between Iranian banking systems and the world . The only way to move money abroad is via crypto, but first you have to buy it. So if the Iranian exchanges Don't give you service, you can't do anything. Unless you know someone trustable that has bitcoin and he is willing to exchange it for fiat, which is rare.