While we wait for Adobe to introduce an AI version of noise reduction (I'm hopeful but not holding my breath) the new masking features can sure be helpful for some light noise removal. Also it is still a RAW file which is a nice bonus. We have 3rd party NR options but if anyone wants to mess around within LrC it's a bit of fun. You can wipe out background noise completely but subject noise still suffers if you push it too far. That is where the 3rd party shines.
Before LR11 you had to create two files, one for the background NR and the other for subject NR. Then send them to PS, layer and paint. I got that process from this fellow.
https://backcountrygallery.com …se-reduction-using-lr-ps/
With the new masking features select Masking and Select Subject.
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Then Invert the selection and apply NR which will be to the background.
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