Why only a few people are talking about this open-source, airgapped hardware signer for Bitcoin?? It is as good as the Seed-Signer. It has many tools to interact with QR codes. https://github.com/selfcustody/krux

It even has an Android version, created by one of its devs. You can use it on an offline phone. I leave the link for the APK. https://github.com/odudex/krux_binaries/tree/main/Android

Here is a great video tutotial by Crypto Guide: https://www.youtube.com/watch?v=EtV_Iw6a0O0