Well since MCU is going multiverse happy which is affecting that whole universe, if you’re going to play that card for the Spidey IP then yeah it would make sense that characters/variants connected to him would show up. It’s like (just hypothetical) if DS2 featured the 70s TV movie version of that character showing up. That would make sense, right? (In that regard, the rumored DS2 cameos arguably reek even more of fan service than NWH but I digress.)
Ultimately after many years online (including too much time in the mental gymnastics hellscape that is Star Wars discourse) lately I’ve realized there really is one difference between “good” or “bad” fan service: if you dig it.