I think the comparison image proves beyond any doubt that that didn’t ruse anything from TPM. Most likely it is a CG background. The obviously have the tools to do this as the episodes are full of CG backgrounds.
But a note on reusing old CG items. As long as you have software that can read the files, you can use old CG materials. The B5 people have been doing so. And that is going from Amiga to modern systems. So there is no issue. And where ILM crafted a lot of the software themselves, it is very likely that they can use anything from the archives if they want. Also very likely is that the old CG parts were deemed too low quality and were updated or totally recreated. Hard to say unless you know someone from ILM. My bet is that they just analyzed TPM and made everything new. That would likely be the easiest option.