RPi 3 HASSIO (10?) adding ESPhome integration jumps to "add device":

Title describes the issue. I successfully installed ESPHome on a scrap RPi3 for testing and development of a bunch of wireless doodads, but when attempting to install the integration on my target RPi (in a camper van) it jumps to “add device” which fails miserably because there is no device (yet, test is on a different network than the van)

The Development network is repeated in the van (different IP) for Internet access. Could that be the issue?