Hi @daviddewarenne,
information on how to send transactions in Trezor Suite can be found in this article: https://trezor.io/learn/a/send-crypto-in-trezor-suite-app
The same applies to XRP.
Is it possible that the XRP address you want to use as destination address is in X-address format (the address starts with “X”)? If so, you need to convert it to standard address format (starting with “r”). For the conversion, you can use for example this converter: https://xrpaddress.info/