Every step below is from an official source
Switch from Dashlane to Apple Passwords (iCloud Keychain)
What to do at Dashlane before you leave, what Apple Passwords (iCloud Keychain) needs when you join, and everything else the switch touches. Your full plan is built in your browser and stays there.
Official sources reviewed . How we review sources
At Dashlane, before you leave
Export to CSV from the Dashlane web appBefore
In the web app, open the Vault menu, select Settings, then Export data, then Export to CSV. Dashlane downloads a ZIP file to your computer.
Export your Dashlane data to a CSVDashlane. ReviewedKnow what a CSV export leaves outBefore
Passkeys, attachments on Secure Notes, and 2FA tokens can't be exported to a CSV file.
Export your Dashlane data to a CSVDashlane. ReviewedMove passkeys with Credential Exchange insteadBefore
Passkeys can move between Dashlane and Apple Passwords, 1Password, Bitwarden and some other apps. They can't go in CSV files or DASH backups.
Can I share, import, export, or back up passkeys with Dashlane?Dashlane. ReviewedDelete the CSV files when you finishAfter
CSV files aren't encrypted and others can read them. Dashlane recommends deleting the CSV file from your device when you are done.
Export your Dashlane dataDashlane. Reviewed
At Apple Passwords (iCloud Keychain), when you join
Import a CSV file into Passwords on MacDuring
Export your passwords from your old app as a CSV file. In the Passwords app, choose File > Import Passwords from File, choose the file, then click Import.
Import passwords from another app into Passwords on MacApple. ReviewedReview passwords that didn't importAfter
Imported passwords won't replace ones already in the Passwords app. You can review any passwords that couldn't be imported.
Import passwords from another app into Passwords on MacApple. ReviewedDelete the CSV file after importingAfter
When the import finishes, Apple's steps have you delete the CSV file to protect your accounts.
Import passwords from another app into Passwords on MacApple. Reviewed
Then: everything else the switch affects
The steps above are what Dashlane and Apple Passwords (iCloud Keychain) say. Your full checklist adds the accounts, codes, payments and devices that depend on your password manager, in a safe order. It's built from your answers, in your browser.