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From Pathfinder Lost Omens Draconic Codex, which isn't enabled.

Deepening Devotion

FEAT 10
ARCHETYPE
Archetype Draconic Acolyte
Prerequisites Draconic Acolyte Dedication

Your investment in your draconic gift has unlocked greater power. When your spectral dragon shares your space, the status bonus to saves against sleep and paralysis increases to +2.

In addition, you can use Draconic Salvation if you succeeded or failed on your saving throw, not only if you critically failed.

Pathfinder Lost Omens Draconic CodexORC