Entrynav2 (No Navigation) 8.8 inch screen?

[Trustedcarrots]

Hello, I was under the impression all HU_ENTRY NO NAV 6.5 inch systems cannot upgrade to 8.8 inch screen without changing the headunit as well to NBT, NBT EVO or ENTRYNAV. But I have gone down the rabbit hole today on the forums and see a few threads about 8.8 inch retrofits on NON NAV cars. Is this only possible on cars that show HU_ENTRYNAV2 (entrynavevo) on esys and not HU_ENTRYNAV? I know it says entrynav2 but these units physically say HU_ENTRY on the actual headunit which confuses me.