Currently, Trezor One and Trezor Model T are not supporting XRP
What is Ripple XRP?
Ripple (XRP) is cryptocurrency and a Real-time gross settlement system (RTGS) and a remittance network. Cryptocurrencies usually use PoW algorithm or computational power to run a network while Ripple is mined. It does not rely on the computational power to perform transactions while it uses a validation server which compares transactional records constantly. To ensure integrity Ripple is based on a shared public database which may belong to anyone from an individual to banks. Furthermore, Ripple is represented by a symbol known as XRP which is a medium to transfer money between two parties.
More information about ripple – click here