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

Yes

The meaning, spelling, and grammar of "congelada" are identical in both Brazilian and Continental Portuguese. The only difference is pronunciation. In Brazilian Portuguese, the vowels are typically more open and clearly articulated, giving the word a more melodic rhythm. In Continental Portuguese, unstressed vowels are much more closed or reduced, which can make the word sound "clipped" or shorter to a Brazilian ear.

Brazilian Portuguese Examples:

1. Eu comprei uma pizza congelada para o jantar. (I bought a frozen pizza for dinner.)
2. Ela ficou congelada de tanto susto. (She froze from so much shock.)
3. A minha conta bancária foi congelada ontem. (My bank account was frozen yesterday.)
4. Essa lasanha congelada é muito gostosa. (This frozen lasagna is very tasty.)
5. A água da lagoa está congelada. (The water in the lagoon is frozen.)

Portuguese (Continental) Examples:

1. Comprei uma pizza congelada para o jantar. (I bought a frozen pizza for dinner.)
2. Ela ficou congelada com o susto. (She froze with the fright.)
3. A minha conta bancária foi congelada ontem. (My bank account was frozen yesterday.)
4. Esta massa congelada é muito boa. (This frozen pasta is very good.)
5. A água da lagoa está congelada. (The water in the lagoon is frozen.)