In example, we have multiple domains; example.nl, example.de, example.fi, example.com.br. example.es, etc..
If we create a trustpilot page for our company and get enough reviews, would we be able to use the review snippet on all domains?
I assume you are referring to rich snippets for SEO.
If you create a company profile for example.com on Trustpilot. Only example.com would be eligible for rich snippets.
It would be a weird experience for the user and also Google if you were collecting reviews for example.com and displaying them on example.fr.