16819 adds support and has been merged. Hopefully this is included in the next release, but in the mean time you can copy the new/updated files into your Cura installation and they will be available for your use. That's what I'm doing until these changes make it into a release.
17576 is still open and adds & updates some additional configurations if you are interested in using those resources. I haven't used these yet, but it looks like a number of people have tested them and found them to work.
Is your feature request related to a problem?
I buy a new product that relies upon a 3rd-party product that doesn't support it.
Describe the solution you'd like
Support for the Elegoo Neptune 4 Pro, please.
Describe alternatives you've considered
n/a
Affected users and/or printers
Elegoo Neptune 4 Pro
Additional information & file uploads
n/a