Need help migrating DataGridField to JSONField

Trying to migrate old Plone with DataGridField to Volto ObjectListWidget without much success. Please advise what is the best way to do it, thanks.

Setup, based on uvx cookieplone project:
Volto 19.3.0
Plone 6.2.1
plone.restapi 10.0.2
CMF 3.8
Zope 6.1
Python 3.14.7 (main, Aug 8 2026, 17:19:07) [Clang 21.0.0 (clang-2100.1.1.101)]
PIL 12.2.0 (Pillow)

Backend content type:

PEOPLE_LIST_JSON_SCHEMA = json.dumps({
  "type": "array",
  "items": {
  "type": "object",
    "properties": {
    "name": {"title": 'Name', "type": "string"},
    "email": {"title": 'Email', "type": "string"},
   },
  "required": \["name"\]
  }
})

class IContact(model.Schema):
    people = JSONField(
        title="People List",
        description=u"Add name list",
        required=False,
        schema=PEOPLE_LIST_JSON_SCHEMA,
        # default=[]
    )

No other setup at Volto end.

The field display (edit mode) shows a regular text edit widget. Expecting row and column table widget kind.