Why? What's particularly heavy in these gnome tools?
Like the particular programs are no issue, but the whole UNIX-userspace as done in the mainframe era and still is. Like you definitely need cooperative program suspend/resume like on Android for any kind of sane battery life, but that's unfortunately completely missing in case of GNU/Linux.
Gnomes' a massive memory hog
I was looking at this and thinking maybe it would improve a cheap android phone. But now I know it's running gnome I won't even consider trying
> What's particularly heavy in these gnome tools?
Nothing. On my phone there's 770MB RAM consumed by the entire system with Phosh running right now. The rest is free to be eaten by the browser.
If anything, it's GTK that can be rather inefficient when it comes to rendering (both GTK3 and GTK4, but for different reasons). There are some tricks that phoc (Phosh's compositor) could still learn too, but it will get there.