It will be technically a bit more challenging, but I don’t think you need to use the lantern power monitor software with the device. The device seems to be built around two MCP3008 IC’s, which are basic 8 channel analog to digital converters. The values from these can be read and processed (like, sent to home assistant) using a python script on the raspberry. This is the kind of minimal programming effort someone with no experience could do using chatgpt.
First, this seems to be three years old. Second, he is one of the contributors to HA, HA was originally started by Paulus Schoutsen who is still an active contributor.