It usually takes a few days. If you use droid-ify its there if you enable the newpipe upstream repo. You are not of course getting it from f-droid then.
@SidewaysHighways@Marduk73 Alternatively, you can also use Obtainium (available in the F-Droid App Store) and add the GitHub repository of NewPipe directly. You will then receive NewPipe updates as soon as they are published on GitHub.