What kind of “furtiger” aesthetic is this??

It's certainly because when it comes to the word "Frutiger", Frutiger Aero comes most to mind since that's what the aesthetic was all about. Someone has mentioned before that this is close to another Frutiger aesthetic, being Frutiger Metro that certainly is very similar to the images shown by the OP. It's very Frutiger Metro, just with less of the aesthetics you'd usually see (stereo speakers, mostly bright neon colors, general themes of music). I don't know if it's possible but it could be a little side genre (?) of the aesthetic that focuses more on nature and more toned down colors.

I think I found the name for this aesthetic: Vector Flourish.

aesthetics.fandom.com/wiki/Vectorflourish