I think many Chinese people are also bilingual

Yes... some are even tri-lingual because of village dialect (eg: Taishanese) + province dialect (eg: Cantonese) + national dialect (Mandarin)

Unfortunately, the PRC government is heavily pushing Mandarin and some of the local variants (aka: "dialects") are slowly dying... some kids in Guangzhou don't even speak Cantonese anymore...

(i.e. Wu+ always mandarin)

Shanghaiese is semi-dead... from what I heard

Cantonese is slowly limping its way forward only because they have Hong Kong TV, I don't think there are many TV shows in Shanghaiese.

If Hong Kong falls... Cantonese is gonna die... :(

Parents also never spoke Taishanese to me... so yea I unfortunately cannot pass on that language... no Taishanese media... hard to find motivation to learn more about it.

So I only have Cantonese and Mandarin...

I doubt my kids (if I ever have any) would be able to learn it... most 2nd generation overseas Chinese kinda just English-Only with bare minimum in ancestor's language.