When will Trezor Safe 7 be supported by Wasabi?
The Trezor firmware team is working on that. The plan is to implement the needed changes in Electrum Wallet first and then add support in the Bitcoin Core HWI project, which Wasabi Wallet depends on.
There is a small challenge in the technical details because Trezor THP (Trezor Host Protocol) encrypts communication, which requires a handshake (key exchange) and then uses the key for the whole session. There's also a nonce that increments after every message on both sides (Trezor and Host) and needs to be kept in sync.
Currently, HWI is stateless and does a good job abstracting all the different details in terms of API calls and communication protocols. This means that delegating or leaking the session and nonce details to the host would break the smooth HWI API. So it seems the session could be handled by HWI itself.