keystone - https://keyst.one/
They will soon be launching a developer-focused hardware platform that allows developers to run their own custom firmware. They are currently in the naming phase: https://x.com/KeystoneWallet/status/2011415565735277005 .
onekey - https://onekey.so/
Can submit PR here GitHub - OneKeyHQ/app-monorepo: Secure, open source and community driven crypto wallet runs on all platforms and trusted by millions. but an official person from RadixDLT needs to reach out to discuss scheduling and integration cost.
foundation - https://foundation.xyz/
All needed code to build on the Passport Prime will be open sourced here Foundation Devices · GitHub and anyone can build - no gatekeeping at all.
Method for vetting hardware wallets - https://walletscrutiny.com/