form request, validate array and store the validated() in a model

Hello, I encounter a problem with the form request validation, I want to validate the surfaces and store it with the realtionship createMany()

POST:

{
    "data": {
        "type": "properties",
        "attributes": {
            "type_transaction": "SALE",
            "property_type": "HOUSE",
            "property_subtype": "FARM",
            "surfaces": [
                {
                    "field": "bedroom",
                    "value": 23.00,
                    "unit": "M2"
                },
                {
                    "field": "living",
                    "value": 43.00,
                    "unit": "M2"
                }
            ]
        }
    }
}

PropertyRequest.php

return [
  ...
 'surfaces'                       => 'array',
 'surfaces.*.field'           => 'string',
 'surfaces.*.value'         => 'numeric',
 'surfaces.*.unit'            => 'string',
];

I get this results when I dump the validated request

$validated = $request->validated()
dd($validated);
array:7 [▼
 ...
  "surfaces_0" => array:3 [▼
    "field" => "bedroom"
    "value" => 17.0
    "unit" => "M2"
  ]
  "surfaces_1" => array:3 [▼
    "field" => "living"
    "value" => 43.0
    "unit" => "M2"
  ]
]

Is there a way to execute createMany() with this result ? I would like to write something like this:

$porperty->surfaces()->createMany($validated['surfaces']);

I have think to use multiple validator (one for each model (surfaces, nearby, rooms, ...) but honestly I don't know how to handle it, if you have suggestion on how I should do it, share it :)

Thank you !