We will support chains available on Metamask directly within Keychain, using the same standards as Metamask. This means that any dApp currently using Metamask for signing would also work with Keychain right out of the box.
As for our swap aggregator, it will work both with:

• Keychain only (Hive + EVM)
• combination of Keychain for Hive and Metamask for EVM tokens

Hope I'm answering your question =)