Lt. engl. Guide.
What doesn't count towards your Survival Milestone Progress:
Planets with Aggressive Sentinels.
Standing anywhere on or near Ancient Ruins containing Artefacts.
Staying in a cave or similar underground space. Glitch Note: Underground areas are buggy in that sometimes they will count towards the Survival trophies but other times they won't so save yourself the hassle and don't bother going underground.
Staying in a building that is above ground
Sitting in your Exocraft or Spaceship.
Swimming on or underwater
Driving or flying around your chosen Extreme planet.
Parking your Freighter in orbit around your chosen Extreme planet and staying on that for the duration.
Pausing the game or leaving a menu open.
Being on-board a derelict Freighter (either in space or on a planet).
Settlements in some rare cases. Glitch Note: For reasons that are currently unclear, it's possible for the stat tracking to fail when doing certain Overseer missions in your settlement. Due to this and the Guide Author's inability to recreate this glitch, it's recommended you avoid getting a settlement until after obtaining both of the Survival trophies.