How to add custom field with react component

Hi,
When i follow the documentation on adding the phone field to check out it started giving me an errors.

Because there are custom tags like is giving me an error in my react component. is there a way to fix it or is there a react package i needed to import in order get this tag available in the component.

Thanks.

The easiest way to use template override with a frontend framework by defining the override in an external file. Unfortunately, since the component overrides are compiled using the vue compiler, there is no way to use a react component as the override.

hi @lea ,
I am using Gatsby as my front end and I am not sure on how and where to put the external file. Do we have any guide or example around it.
Thanks.