Change input value in admin-on-rest from another component
You need to connect the GeoSuggest input separately to the FormState using something like below
https://redux-form.com/7.1.2/docs/api/formvalueselector.md/
Don't think this can be handled by TabbedForm directly. You will have to write a custom form.
This answer might help in writing a custom form. Look at the last answer where I have documented how I created a custom form.