from what was told to me by some users, some devices do not appear to have the option to see the larger image before sending, making it difficult for some to know which one they should actually send

Sorry, but I still don't get the point.
If I decide to upload images from my smartphone
it offers a bunch of capabilities to decide which file to choose:
I can see previews
I can scroll through the list
and I can even enlarge an image to fullscreen view in case I'm not sure
Thus in the end I KNOW which files I want to select
and I do select them or not.

So why would I need another preview showing me the files I selected just a second ago?

So .. I was supposed to see the carousel images ... or slides before sending ... because with the names on the mobile devices, there are people complaining on my network ...

Oops, is this a Safari special?
Honestly, I've never seen this before ... With all other browsers I've tried so far (Win10, Linux, Android - Chrome, Chromium, Firefox, Edge) I'm getting just the filename of the uploaded image - not a preview.

Most likely it's a native browser function (like the 'Choose File' button), and these kind of browser internals can't be changed by the html running inside. Maybe there's a browser config option to change the size, don't know ...

Hey Z.. he is talking about this:

It is pretty small on a phone but I am not sure why anyone would want it larger.
When you select the image on an iPhone, the photo directory opens and you see large icons anyway.

Sorry, I still don't seem to understand.
We're talking about uploading images from a device to your Ossn community, don't we?
I already showed the workflow on Windows,
and on Android it's very much the same:
Clicking any of Ossn's 'get image buttons' inside the Android browser is triggering a native communication between the browser and Android. This time Android will offer some sources (camera, fotos, etc) where to choose the image from,
and again you have the option to enlarge any picture BEFORE selecting it for uploading. So why and where should Ossn interfear this flow?

I think the simplest way to explain it would be, you know when we are going to upload an image for example on instagram? that after selecting the images do you have the option to view and edit them? so .. I thought of the idea of ​​not actually editing ... but of the user being able to see the "big" image before actually confirming the upload ... because on the cell phones the same ones when we open the gallery, we see the thumbnails ...

Hmm ... I'm afraid we're talking about different things
Could you please be more exact (name the directory, download url, etc) about what you mean with "image upload component"?

I talked about cell phones ... as they are miniatures ... some say it is difficult to choose photos (including effects) to post ... so the idea of ​​a preview within the network

No idea what you're talking about?
I mean, the image file selector is not opened by OSSN but the browser running on the underlying operating system. Thus
OSSN has no impact on the appearance of that native selector nor any way to change it. It's solely up to you how to configure the view of that selector.
So on Windows for example, I may either choose a 'list' view like

or I may choose an image preview mode like