from the last paragraph of the wiki article you linked > In June 2020, BAE announced they had completed test firings of the APKWS from a ground launcher for th

from the last paragraph of the wiki article you linked > In June 2020, BAE announced they had completed test firings of the APKWS from a ground launcher for the first time so it seems like they've got them launching from the ground. That seems like a real possibility to defend against these kinds of drones. However, I don't think it's a problem of technology or cost right now but of availability.