Yes, they offer it, its tricky to find the option on the mobile app, but it is there. It took me a while, but once you are at the exchange screen you can select the wallets to exchange currency from and to, so, in theory you just need to convert money from your BTC wallet to your FIAT wallet and the other way around.

Update on my verification process: DENIED.

So I submitted new documents, as they as in their website ( https://help.wirexapp.com/hc/en-us/articles/207161719-How-and-why-to-verify-Wirex-account- ), passaport (that has English translation) and a landline telephone/internet bill (which I had to translate to English, since companies in my country do not send bills in a non-official language, obviously). Just hope they don't complain that my country language is not English and that they be a bit faster on the verification process this time.