How do I switch to zkSync when it doesn’t support AtomicWallet?
Just use wallet connect: How to use Wallet Connect? - Atomic Wallet Knowledge Base
This Wallet Connect seems to only be a feature on the mobile wallet and not the desktop wallet.
Welcome to the forum!
Yes, the wallet connect working only for mobile apps. The desktop Atomic wallet is not compatible with Web3, so it can’t sign messages or transactions on Web3. In this case you can use its phrase in the Metamask, and should have an access to your tokens. But perhaps you will need to create several accounts in the Metamask until you find your address (they all derived from the secret phrase).
The other way is to install their mobile app and use WalletConnect