Is Fedi available in my country, and is it compatible with my local currency?

Fedi utilises bitcoin, which is available globally (though you may need to check the legal status of bitcoin in your region). Fedi does support holding funds in a USD or local currency account, where a specific Fedimint module called “Stability Pools'' has been installed.

You will have to check with your Federation guardians whether the stability pool module has been implemented, and for which currency.