Game concept
Lifestyle Trait
The game also links it as Lifestyle Traits.
From the game's encyclopedia
A Lifestyle Trait is the result from picking certain Lifestyle perks, Decisions, or Interactions.
Some Lifestyle traits are upgradeable as the character improves their mastery of the skill. The levels range between 1-3, and the stars on the trait icon indicate the current level.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Lifestyle Trait is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A Lifestyle Trait is the result from picking certain Lifestyle perks, Decisions, or Interactions." It is part of Trait. The game also links it as Lifestyle Traits. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.