Today I learned a thing, and I want to share it here where it may help other DMs - this drive, the only known surviving Divinity Drive on Golarion, cannot be intact in the Starfinder setting, because Casandalee ascended to godhood and later joined Triune. Casandalee ascending in this adventure explicitly destroys this particular drive. If you're as finicky about accuracy as I am, that means writing a different Divinity Drive into your story if you want one to be present.
At minimum, to have this exact drive in the Starfinder setting, you'd have to handwave that it survived, and was successfully ejected from the planet prior to Golarion becoming lost to the Starfinder setting - which wouldn't be so hard given what we're talking about. Similarly, the Divinity was not the only vessel of her class to be constructed, which is the approach I'll be taking going forward.