@BenBear fixed this myself. For others who experience this, solution is to reset your router and then wait about 5 minutes - slowly, the plugs will come back online.

All of my plug devices appear offline in the app - 5 in total. 3 are P100 plugs, Hardware 2.0, Firmware 1.2.5 2 are P110 plugs, Hardware 1.0, Firmware 1.3.4 I have WiFi at home on multiple devices -...