laravel - query date between always return empty result

I am using laravel 8 and I want to get ids between two dates form created_at column which is timestamp format I use the following code

    $ids=Visit::select('id')->whereBetween('created_at',[$request->input('from_date'),$request->input('to_date')])->get();
return response($ids);

but I get an empty result

I tired to convert the inputs to time using the strtotime() function but also I get the same empty result

    $ids=Visit::select('id')->whereBetween('created_at',[strtotime($request->input('from_date')),strtotime($request->input('to_date'))])->get();
return response($ids);

the input type in view page is date

could you please help with the correct syntax