User blog comment:T-888/Do the Sokovia Accords really matter?/@comment-27496405-20170909012641/@comment-27496405-20170909041035

But the Incident on Midland Circle was not known to the public... The building was not well built and that's it. That's the official version, remember? So the Avengers do not know what exactly happened nor S.H.I.E.L.D. nor Spider-Man.

It was said that the Hand's thread was too big so as to call Defenders' attention but not big enough to call the attention of the Avengers. - Showrunners of Defenders.

Spider-Man had no reason to get involved. Queens is far far away from Hell's Kitchen (if we follow real life places...)