There are good alternative devices in similar card format liek Satochip and Keycard, that are both open source.
They provide much better alternative for backup with encrypted cards like Seedkeeper.
But I don't think they use NFC (not sure). There was a similar one but it's from a different wallet provider. I am trying to remember the name even asked chatgpt to find it's name with no success so if someone remembers tha,t then please post it. All I can remember is it's from a Singapore-based one.
It's good to know that Tangem had security flaws, but OP suggested that it is a convenient and better option than a hot wallet for our smartphone, as it provides better security for our small stash than being connected to the internet all the time.