Fitted the Mojave SSD of the E6220 in my D630 and added the necessary modifications for MBP7,1 model:
patched PlatformSupport plist (already in place for MBP8,1 SMBIOS on E6220) posted above
installation of nVidia kexts/pack from High Sierra 10.13.6 to /S/L/E
10.13.6_nVidia_kexts.zip
replacement of Mojave's /S/L/UserEventsPlugins/com.apple.telemetry.plugin by High Sierra 10.13.6's version
com.apple.telemetry.plugin.zip
The results are similar to what's achieved on the E6220 with HD3000: full graphics acceleration with minor defects (more visible in light mode than dark one).
Other than the above small graphics limitations, D630 appears fully functional (sleep/wake, LAN, wifi, WWAN, audio, dGPU throttling/AGPM, etc.)