Can sparrow wallet be used air gapped?
Yes!
You can have two Sparrow wallets, one on an air-gapped device and another that is watch-only, and use QR codes to put transactions from the airgapped wallet to the watch-only wallet.
This guide shows you how. Even though it is written with Airgap Vault in mind, you can also replace it with Sparrow Wallet as the software on an air-gapped computer, and use it like a regular wallet. https://support.airgap.it/guides/sparrow/
The Jade can also be used in air-gapped mode, you can use Nunchuk as the watch-only wallet in that case. https://help.blockstream.com/hc/en-us/articles/20347921365785-Send-air-gapped-bitcoin-transactions-with-Jade