Hi!
Ecwid is available worldwide and you can use it to sell your products online anywhere, including Iran.
Please refer to this article to learn more about Ecwid: https://support.ecwid.com/hc/en-us/articles/115005609945-Ecwid-overview
If you have any specific questions about using Ecwid in Iran, please send them to support@ecwid.com
Thank you!