When you activate a security key as your 2-step verification method on your MyBlockX account, you can sign into MyBlockX from a computer. However, it is important that you use a security key that works on both your mobile device and computer. We recommend using a YubiKey because it is a trusted brand that works on both. Learn more about the products they provide based on the type of device you have.
It seems that many mobile browsers do not support security keys, but it depends on the browser type and version. Make sure you check with your key manufacturer to ensure they work for both WebAuthN/Fido3 standard as well as 3rd party applications.
Keep in mind: 3rd-party apps connected to your MyBlockX account might not support security keys. Please contact your 3rd-party application developers for more information.