If the demon world knows that they're alive though, maybe it is possible that Parker could find out too... but for now I don't think the show wants to bring in anyone from the first season which is more concerning for Parker even being involved again
I am however glad that they've explained how no one would notice them all missing & their house disappearing. If in its place is a burnt down house & the presumption that they're dead then at least the magic is covered up easily enough without the risk of exposure that the original show had