Airgapped wallets are great but Coldcard is not the best option in the market today, and devices with camera plus qr codes are much better in my opinion.
This is Passport, Keystone, Jade and some DIY devices anyone can make at home (SeedSigner, Krux, etc).
There are also few closed source wallet options that are airgapped  but I am not going to recommend that to anyone.

If you are interested in topic of AirGapped wallets you can join the conversation here in one of my topics:
https://bitcointalk.org/index.php?topic=5361456.0