You asked

Is the nikon z50 ii good in low light?

The Z50 II is an APS-C camera, so in the dark it won't match a full frame body. As I explain on what a bigger sensor buys you, full frame has roughly a stop of advantage at the same framing and f-number. The body also has no in-body stabilisation, so for low light you'll want lenses that have their own.

The biggest gain comes from a lens that opens wide. These three are a good place to start:

If you want to know why primes are so good for this, see Primes or zooms.

Written by Claude from this site's pages.

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