Create Nested Array - eloquent

Question

How can i create this array comes from my form, I have tried like below but it created array: 0 and 1 but array 2 does not created, i know it because am using this if (count($request->pid) > 0) { foreach ($request->pid as $key => $v) {
request->all()
array:12 [▼
"_token" => "aXAkdBEVfO8nLMtxjUoHgxbvBkxMbJz4zIonOvFm"
"projectdate" => "2021-08-30"
"clientName" => "Emmanuel"
"garamakaz" => "600"
"amountpaid" => "7888"
"Note" => "madirsha 50"
"pid" => array:2 [▼
0 => "1"
1 => "1"
]
"qty" => array:2 [▼
0 => "10"
1 => "10"
]
"discount" => array:2 [▼
0 => "500"
1 => "500"
]
"subtotal" => array:2 [▼
0 => "479500"
1 => "479500"
]
"descExps" => array:3 [▼
0 => "Ex1"
1 => "Ex2"
2 => "Ex3"
]
"amountExps" => array:3 [▼
0 => "45666"
1 => "45666"
2 => "45666"
]
]
Controller
this is my controller i used to created those data.
public function store(Request $request)
{
if (count($request->pid) > 0) {
foreach ($request->pid as $key => $v) {
$data2 = ([
'projectno' => $fk,
'user_id'=>Auth::user()->id,
'pid' => $request->pid[$key],
'project_date' => $date,
'discount' => $request->discount[$key],
'qty' => $request->qty[$key],
'clientName'=>$request->clientName,
'costproject'=>$request->garamakaz,
'comment'=>$request->Note,
'amountpaid'=>$request->amountpaid,
'amount' =>$request->subtotal[$key],
'description_expenses' =>$request->descExps[$key],
'amount_expenses' =>$request->amountExps[$key]
]);
$creatdata=Project::create($data2);
}
}
what can i do to create all data comes from my form?, someone can help me on this