This is an VTEX IO app that provides the tooling for adding extra fields on your Instore Customer Profile Registration Form.
It is as simple as creating a new IO React App and adding
"registration-container/{{whatever-name}}": {
"component": "vtex.instore-form-fields/FormInput",
"props": {
"ffor": "{{key on Masterdata}}",
"nameKey": "{{locale key to label the input}}",
"initialValue": "{{if any, it is optional}}"
}
},
And also, don't forget to add the same key on Masterdata you mentioned on your app, otherwise it won't save a thing.