BVNK merchants can use any mobile app-based authenticator that supports QR codes. These apps provide greater peace of mind than 2FA based on SMS one-time passwords, which are vulnerable to SIM-swap attacks and other exploits. They also work whether you have mobile connectivity or not.
Check out some recommended authenticator apps.
Note: At BVNK, we use QR codes to activate 2FA on clients' accounts. Therefore, we do not currently support hardware security keys. If you use security keys, check whether your provider has a compatible authenticator app.
For example, holders of most YubiKeys can use them in tandem with Yubico Authenticator, combining superior security with the wider applicability of app-based solutions.