Hi there, Kate!
Welcome to the Disney Parks Moms Panel! I am thrilled to hEAR you have a
Walt Disney World Resort vacation planned and know you must be eagerly anticipating the fun and magic that awaits you and your family!
Thank you for stopping by with your question about your upcoming visit to the theme parks! Yes, you are correct, as of May 1, 2019, Walt Disney World Resort
park rules state that wagons of any sort are no longer permitted in the theme parks. While I am not personally familiar with your specific equipment, I did a quick search online and see that it has the appearance of a wagon, which is not permitted. So, therefore, I would recommend leaving the item in question at home and option to use a stroller for your visit.
Strollers are available to rent at the theme parks or you can opt to bring one from home, as long as it fits within the size requirements.
Hopefully this helps answer your question for you and helps you best prepare for your magical vacation! If you have any other questions, please visit us again!
Stephanie