It is probably too early to say any specific project is Drupal 10 compatible given the anticipated new deprecated APIs with Drupal 9.4 and Symfony 4 to 6, however some projects went ahead anyway. Once you fix all incompatibility errors, including updating the info file, your project is in this category. The final steps are tagging releases so people can use the compatible version of the project. Any tagged release is better than a non-tagged dev release.
Results are from dataset #136 from 2022-06-26T14:32. Report is ran by the Drupal Association regularly.