How can I get my 3 year old to interact with other kids?

My 3-year-old daughter is afraid of other kids at the park. She runs away from other kids and won’t go on any equipment that other kids are on. During a pandemic, she’s been home with me, and we’ve mostly only gone to the park when there weren’t other kids there. Now the parks are getting busier, and I’m trying to encourage her to socialize a little bit, but she’s terrified. I feel awful. We moved to this new neighborhood just over a year ago, so we haven’t really been able to make any local friends. How can I encourage her and help her learn to interact with her peers?