You can save your shield from total destruction, even after a devastating attack.
Archetype
Feat type
Archetype Feat
Level
12
Traits
Archetype
Prerequisites
Bastion Dedication
You can save your shield from total destruction, even after a devastating attack. If a shield would be destroyed due to damage taken during your Shield Block, the shield remains intact at 1 Hit Point instead. Its construction is weakened until you take the time to repair it thoroughly, preventing you from using Shield Salvation to save the same shield until your next preparations.
Source: Pathfinder Player Core 2, p. 187
Bring Shield Salvation into a Pathfinder 2e game with The DM Screen.