Q: Is there any way to easily reorder clips in a project by chronological order?

In the browser set the clips to be sorted based on content created. Select all the clips and press E to put them in the project. They'll be in that order.

Your clips are already in a project and you want to rearrange the clips into chronological order? You made all your selects inside a project? Is this right?

So they're all in one project? Use the filter HUD to show used clips only. Make a keyword collection and drag all the clips into it. Set the clips in the collection to display in content created order. Edit the clips into a project.

DDouble click the search magnifying glass or Cmd-F. From the + button find used media.