Welcome to the community, @Alexis_Camacho!
As @kuovonne mentioned, the metadata about your attachments is not directly accessible via formula fields, although that would be nice! Please submit this as a feature request to #show-and-tell:product-suggestions and/or to firstname.lastname@example.org.
However, keep in mind that ANYTHING that has access to the Airtable API can pull in that attachment metadata information into your fields for you.
See screenshot below for how this information is easily selectable in Integromat — just click on what you want with your mouse,
So, you still have other ways of getting this information into your fields, and it can be automated as well.