@Stephennie-Lynn0
You can go to whatever platform you wish to list yourself...there are no Apps per se. You can use a Property Management Software attached to your Airbnb account (fee required) that can assist with that. However, if you only have one listing, it's probably better to list on them yourself.
Use caution however, as syncing the calendars is not instantaneous, and there is the possibility of double bookings. Most Hosts allow instant book on Airbnb (if you want to) and list on other platforms as Request to Book to avoid this issue.