Apply laravel validation rule to all fields at once - php

Question

I have inputs, some of them are array inputs (e.g. <input name="test[]">) and some are normal ones.
Fields have some specific rules, but all of them share 2 rules together.
I want that same validation rule to be applied to all fields instead of copying the same thing again and again for like 10+ fields.
I tried:
$rules = [
'*.*' => ['max:100', new CustomRule], // Apply to all
'name1' => ['array'],
'name1.*' => ['specific_rule'],
]
but it didn't work, then I moved that *.* to bottom like this:
$rules = [
'name1' => ['array'],
'name1.*' => ['specific_rule'],
'*.*' => ['max:100', new CustomRule], // Apply to all
]
and then suddenly it works!
A little confused about why it doesn't work on top, and I'm not sure if this is the right way to do this.
Please advise.
Edit:
The whole thing (removed some of the rules to simplify):
$data = json_decode($request->getContent(), true);
$rules = [
'contact' => ['required', 'array'],
'contact.name' => ['required', 'string', 'max:255'],
'contact.email' => ['required', 'email', 'unique:users,email', 'max:255'],
'subscription' => ['required', 'array'],
'subscription.type' => ['nullable', 'integer'],
'*.*' => [new CustomRule], // Works when it's here, doesn't work on top, this is a Regex rule, looking for some invalid characters in all inputs.
];
$validator = Validator::make($data, $rules);
if($validator->fails())
{
return response()->json($validator->messages(), 400);
}