How can I retrieve media immediately after the model has been created?

[SH1R3F]

I'm trying to hook an observer to my model which has media. I will send my created model to an external API with its images so I made a created observer and send the model along with $model->getMedia('collectionName');
But it actually sends an empty array for the media. then I look in the database I find that the media has been created and existing.
I ran it in a queue to see what happens and it sends the real media array if it's in queue. But I want this to happen without a queue too?!
So how can I retrieve its media immediately after model is created?