Found your laptop after sending the Remote Wipe from Nextcloud?!
Don’t want it to delete the Nextcloud files and account?
Cancelling a Remote Wipe can’t simply be done through the web interface, other than removing the token to force a new sign in (unclear whether the wipe will still occur).
Using your preferred MySQL tool, connect to the nextcloud database and browse the table oc_authtoken. Filter for type=2, you should be able to confirm the name, then change type from 2 to 1 to cancel the remote wipe for that device.