Contacts, Chat, etc…

Contacts

The default migration behavior will result in the migration of users' ‘Other Contacts' into the ‘My Contacts' section.

Chat

When migrating chats classic Hangouts chats predating mid-2021 will undergo migration. These chat records will be transferred as emails to the designated user mailbox.

Migration of new Google Chat records is not supported at this time.

Google Keep

The migration of Google Keep notes is not currently supported.

Recommendations
Users should to download and then upload their Keep notes manually.

Google Sites

Migration of Google Sites is not currently supported.