Laravel merge image by path to Request for validation

Question

I'm very new to Laravel.

I'm trying to integrate temporary image upload to my forms.

What I want to do. When the user selects a image the image gets uploaded temporarily to the server after verification (like max:1024|image).

And on the final submit we get the temporary image's url to our controller (works as planned till now).

Now I want to validate the image once again cause the temp directory is same for multiple types of images and different types of image can have different validation rules.

I tried to do

$simulatedUploadedFile = UploadedFile(Storage::disk('temp')->path($tempImageName), $tempImageName);
// Tried this
$request->files->set('image', $simulatedUploadedFile)
// Also this
$request->merge(['image' => $simulatedUploadedFile]);