This cane up when posting in #plugin RSS Polling plugin topic.
Android Chrome App install. Checked permissions doesn’t show any new. Still only Notifications
Is this Meta installed as a PWA, or the DiscourseHub app?
Have you seen this on other sites, or in other Discourse topics? It looks like this prompt can come up when a site is looking for local network access, but I don’t see anything obvious that would trigger that in that specific topic… do you have an ad blocker installed? if you select “block” you shouldn’t notice any issues 
This only happened once here in Meta. I am guessing it would be pwa? It is just a Chrome app install.