0 used to say that someone is very surprised, happy, unhappy, etc. about something:
Much to her surprise, there were two police cars parked down the street.
I actually gave the guy his money back, much to his amazement.
Much to our delight our mission was accomplished and with great satisfaction.
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
much to sb's delight, dismay, disappointment, surprise, etc.