• Added craft\base\ElementTrait::$isNewSite.
• Added craft\queue\jobs\PropagateElements::$isNewSite.
• Fixed an error that could occur when saving elements, if any dependencies defined global functions whose names conflicted with Yii’s built-in validator names, such as string().
• Fixed an error that could occur when applying field config changes if the field class didn’t exist.
• Fixed a bug where ancestors and parent eager-loading wasn’t working on some environments. (#16381, #16382, #16341)
• Fixed a bug where asset, category, and tag relations weren’t propagating to newly-created sites for global sets. (#16752)