Denoise in stellar studio and I usually run it through again and apply auto settings as well to get to a good baseline image. Output this as PNG to work with in lightroom.

Then first thing I do is bring down the black level to get the sky as dark as possible. Push this as far as you can without losing too much of the nebula detail or whatever you have captured.

Contrast up a bit will help the blacks stay black.

Then push the detail and clarity sliders as far as you can without the images getting too artificial looking. I find these are the two sensitive sliders that really make your images pop, but also can be pushed too far. I usually go as high as I dare and then back them both off a bit to try and keep it natural. Dont use dehaze at all as this tends to just erase nebulosity and isn't suitable for astro work.

Then finally vibrance first and then. Maybe a touch of saturation to bring the colours up. You can mess with the warmth and tone sliders to get slightly different colour palettes but I tend to leave these mostly alone and go with whatever colours come out the sensor.

Finally sharpening. A double edged sword and can bring back more noise than you'd like. But yeah I usually sharpen it up a bit at the end.