Thank you for your reply!
As I said in my initial post, it isn’t in that tab and I can’t add it through Edit>Plugins neither (it’s not there).
I have downloaded UE 5.3.2 and I can see it’s there, so probably it’s a compatibility thing.
What I can’t understand is why it’s not appearing in my Vault…
The worst part is that I was working on a project and I updated to 5.4 and now I can’t downgrade U.U