Brave Sync doubt

Description of the issue: I have few doubts on Sync, As I am trying to migrate all my datas to a new brave that i installed using a feature called secure folder in Moto which you can assume cloning an app which is basically another brave, I have created a sync code from my brave1 and enabled sync all now i also added the brave2 to the sync chain.
My questions are

  1. Will i get the old history and all other datas synced or the new datas after i started sync only will be synced.
  2. Is there any option to take a dump or backup of all the datas like history, bookmark and everything to local and import in another brave, Since i can see the exporting option is not available in all community posts just asking whether it is available now or not.
  3. Also have the same doubt with Android and Windows whether the history and datas before i sync will be synced or only the datas after i add the sync code will be synced.

Brave Version(See the About Brave page in the main menu): Android 13, Brave 1.69.164

Type of devices currently running on the Sync chain in question: Both are android devices