Night Mode on the phone camera works a treat, as my friends from the UK would say, but I live in a San Diego
Scoured the web without finding a real consensus on a solution other than moving, but was impressed by A/B comparison images produced by a Nisi Natural Night filter.
And it works! Right of the camera images (size reduced).
Without
With Nisi Natural Night filter
My only complaint is the filter holder ($40) on has a tiny hole in it that has to moved to whatever camera lens you're using. I thought it was designed to cover all three because the$20 filter is so large.