でもあります

is also

→ だ
phrase Rare #41,455
is also A polite, somewhat formal way to say that someone or something is also something. It usually follows a noun or role.
JA: 彼女は医者でもあります。
EN: She is also a doctor.

この私の友人はピアニストであるばかりでなく、作曲家でもあります。

This friend of mine is not only a pianist but also a composer.

ここは私の夢の中のはずだが僕の夢でもあります

This is supposed to be in my dream, but it’s my dream too.

— The Wind Rises (2013)

彼は、政治家であるだけではなく、著名な画家でもあります。

He is not only a politician but also a renowned painter.

それは知事の意見でもあります

That is also the governor’s opinion.

— RRR (2022)