not at all! I think most 10-year-olds would be happy to move for your kids to play. at playgrounds, kids are generally really sweet and accommodating, I find. I know that my kids wouldn’t mind moving.
my mom once told me a sweet story from when my sister and i were toddlers. she was playing with us in a park, and a group of teenage boys nearby were talking and swearing like CRAZY. so she turned to them and said, “I’m so sorry, I have my two young children here, would you mind not swearing?” and one might assume that the boys would have been eye-roll-y or annoyed, but instead they were like, “oh my gosh, we are so sorry! we will definitely stop. we are so sorry. your kids are so cute,” etc. how sweet is that?