developer in multiple team

> I know that it is not recommended but, can one developer
> be a part in different developement team?

What do you think? Is it possible for teams sharing a developer to meet their Sprint Goal commitments?

Yes I think that one developer can be shared between two teams, respecting team size and taking it into account during estimates.
I think that developers can mantain focus on two goal at the same time.
What is your opinion?
Thank you.

It's up to teams to self-organize and make sure their Sprint Goal commitments are met.

Sharing a team member is therefore possible. Can you explain though why "it is not recommended"? What problems might arise and have to be taken into account?

Maybe is difficult for a developer change contest often and I think that a developement team do not change often but should change as nneded taking into account a loss of productivity.

And I do not understand: a team must have one scum master and one product owner. If a developer is shared with another team that works to different product, scrum team maybe have two product owner. It is correct what I say?

Each Scrum Team should have exactly one Product Owner, although the same PO may be in multiple Scrum Teams.

A developer who is shared between teams may of course be working on different products, and thus be collaborating with different Product Owners.