因祸得福 (yīn huò dé fú): A setback or disaster unexpectedly leads to a positive outcome. — Meaning & Stroke Order

Although they lost the game, the coach said it was a blessing in disguise because it revealed their weaknesses.

He found a blessing in disguise when he met his future wife after a car accident.

After losing his job, he found a blessing in disguise and discovered his true passion.

The company's bankruptcy turned out to be a blessing in disguise, forcing him to start a successful business.