Need help connecting a scooter locking/unlocking app to my payment processing website or app

Any input is greatly appreciated. So, i just purchased a scooter that comes with an app to lock/unlock the scooter and other functions such as lights and bluetooth speaker connection. How can i connect this scooter app with a website or app to process payments so that someone looking to ride the scooter can. Similar to lime/bird scooter rentals. The scooter company has no problem with my project as long as i dont need to change any coding for the scooter and app. So im wondering if theres a website that specializes in app integration or if i can build a website or app that processes payments but also has some sort of API connectivity options for the scooter app.