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Is there an object that when hovering over it would bring up an invisible Embedded page?

Insert the Embedded Page on the 'main' page and set to Invisible in Object Manager.
In the Properties of the 'trigger' object add an Event - onmouseover - Show - the Embedded Page.

I was thinking of an option like a "CARD"

Not sure what you mean, can you be more specific?

It's like with a "card", when I pass over an "object" we see the "card".
Is it possible to hover over an "object" and an "embedded page" appears.

It is possible using events although it is not specifically mentioning cards the information still applies
https://www.wysiwygwebbuilder.com/more_events.html
Note you have already asked a similar question see the following answers from Pablo and the link he gave to cards.
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WWBman wrote: Sun Jun 05, 2022 10:14 am Insert the Embedded Page on the 'main' page and set to Invisible in Object Manager.
In the Properties of the 'trigger' object add an Event - onmouseover - Show - the Embedded Page.

Have you tried my suggestion?
It works with a card.

I tried and it works.
But I have a problem because I can't put the same "Embedded page" twice.
I'm looking for a other way.
Thanks!

You cannot use the same embedded page on the same page because then the page will have duplicated IDs. This is not allowed in HTML.

Can you have the same embedded page called by two different events?

yes