PureOS packaging guidelines only suggests to change Maintainer field (and even explicitly encourages to not do it).
Debian Derivatives Census recommends at https://wiki.debian.org/Derivatives/Guidelines#Packages to change Maintainer field - and for good reason: That field tells who is responsible for the package, and Debian cannot be responsible for package releases done outside of Debian.
Please update PureOS packaging guidelines to mandate setting proper Maintainer field.