The work that the Green Web Foundation has been doing seems highly relevant, Chris Adams is the person I’d recommend chatting to, he’s been doing work with them. That covers the energy angle of digital services.
Then there’s of course the materials angle for those products that have a hardware component (everything IoT for example).
The Restart Project are doing amazing work around prolonging the life cycle of electronics through repair.
So maybe one aspect is along the spectrum of “how does this come into the world”, “how is this in the world”, “how does this end its life” kinda thing.