Is the word introvertida the same in Brazilian and European Portuguese?

Yes

The only difference between the two variants is pronunciation. In Brazilian Portuguese, vowels are generally more "open" and clearly articulated. In Continental Portuguese, unstressed vowels are often "closed" or reduced, which can make certain syllables sound much shorter or even swallowed compared to the Brazilian pronunciation.

Brazilian Portuguese Examples

1. Ela é uma pessoa muito introvertida. (She is a very introverted person.)
2. Eu sempre fui meio introvertida na escola. (I was always a bit introverted in school.)
3. Não ache que ela é grossa, ela só é introvertida. (Don't think she is rude, she is just introverted.)
4. Minha irmã é o oposto de mim; ela é super extrovertida e eu sou introvertida. (My sister is the opposite of me; she is super extroverted and I am introverted.)
5. Ela parece introvertida, mas é muito legal quando você a conhece. (She seems introverted, but she is very cool when you get to know her.)

Portuguese (Portugal) Examples

1. Ela é uma pessoa bastante introvertida. (She is a quite introverted person.)
2. Eu sempre fui algo introvertida durante a escola. (I was always somewhat introverted during school.)
3. Não penses que ela é antipática, ela é apenas introvertida. (Don't think she is unfriendly, she is just introverted.)
4. A minha irmã é o oposto de mim; ela é muito extrovertida e eu sou introvertida. (My sister is the opposite of me; she is very extroverted and I am introverted.)
5. Ela parece introvertida, mas é muito fixe quando a conheces. (She seems introverted, but she is very cool when you meet her.)