The MyHeritage Blog has an article that will be of interest to many Brazilian citizens: Obtaining Portuguese Citizenship for Brazilians. According to the article:
“Portugal has been a member country of the EU since 1986. As such, a Portuguese passport would allow its owner to travel anywhere within the European Union, crossing borders easily and experiencing much of what Europe has to offer.
“There has been much discussion in recent years about the possibility of Portuguese citizenship for those with Sephardic-Jewish heritage. If that is your background, check out this Knowledge Base article about researching your Jewish Ancestors on MyHeritage.
“However, if your ancestors were not Sephardic Jews and instead you have Portuguese parents or grandparents, becoming a dual citizen with Portugal may still be within your reach!”
The full article is available at: https://blog.myheritage.com/2023/04/obtaining-portuguese-citizenship-for-brazilians/