can i create a form in app/Filament/Pages/CreateModelname.php?

<?php

namespace App\Filament\Resources\AvailabilityResource\Pages;

use App\Filament\Resources\AvailabilityResource;
use Filament\Resources\Pages\CreateRecord;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\DateTimePicker;
use App\Models\ReservableItem;

class CreateAvailability extends CreateRecord
{
    public static $resource = AvailabilityResource::class;

    public function form()
    {
        return parent::form()->schema([
            Select::make('reservable_item_id')
                ->label('Reservable Item')
                ->options(
                    ReservableItem::all()->pluck('id', 'name')->toArray()
                )
                ->placeholder('Select an Item'),
            DateTimePicker::make('start_time')
                ->label('Start Time')
                ->withTimezone()
                ->required(),
            // add other fields as necessary
        ]);
    }
}