Hi Aroldo,
The example screenshot you are showing is not actually an "autocomplete". It's a search to locate a Collection where you want to add the new Item.
If you use Configurable Entities, the default "Publication" entity submission form allows you to search for authors (Person Entities) in ORCID or in your local DSpace. This works similar to the screenshot you show above... but it won't work for a normal Item submission form.
But, this doesn't necessarily act like an "autocomplete"... it's just a way to select from a fixed number of values.
I think it would be possible to build autocomplete into a normal Item submission form (and maybe someone out there has code which does this).. but it doesn't exist out-of-the-box right now.
Hopefully that helps answer this question a bit, but others on this list may have more thoughts to add.
Tim