[make] an appearance

to attend or show up at a specific event, gathering, or location, often in order to be seen or participate in something

The celebrity made a surprise appearance at the charity fundraiser to show support for the cause.
He decided to make an appearance at the family reunion after not attending for several years.
The politician made a scheduled appearance at the town hall meeting to address constituents' concerns.
Despite his busy schedule, he made an appearance at the wedding to celebrate with his friends.