When using third-party apps, beware, some of them create their own default wallet, different from a Trezor generated one. (For recovering such wallet you would need a recovery seed related to this wallet which is different from Trezor generated wallet.) This is the case of Ronin wallet as well.
Once you initialize Ronin wallet, there is a default account created. If you wish to use it, then you need to keep your Ronin seed phrase to recover and access this account whenever needed. This account is not a part of Trezor wallet.
On the contrary, there are Trezor accounts. The same accounts are generated in MetaMask, MEW, Trezor Suite etc. These are Trezor generated accounts and can be recovered only by using Trezor recovery seed. (in Ronin they are marked with word Hardware in blue bubble)
If you already have any funds in your Ronin standalone (default) wallet, they are on the addresses derived from the seed that was generated online directly in the Ronin wallet interface (thus it is more vulnerable to be compromised).
If you want to transfer them to the addresses derived from the private keys (that is always securely kept offline on your Trezor) simply send them to the account/address marked with that blue “hardware” bubble.