If it’s very frequent, maybe dummy packages. Plant a “steal me” package with a glitter or stink bomb in it and keep it cycling on and off the porch every so often. 😆

I give this advice as someone who has never done it, but watches YouTube.

Second option, and one I’ve been thinking about personally, is an auto-lock package “box” somewhere. Could also be something not permanent, but if you have some serious deliveries coming, you leave it out with a note to put it inside and shut it.

Won’t work so well if you have multiples arriving unless you want to go crazy with a camera and a wifi/app based lock/unlock mechanism.