@qwfbt ,
There are SOMETIMES data recovery procedures, BUT you must have NOT overwritten where the data was.
Much depends upon you knowing where the data was.
The important BraveSoftware folder location:
Linux OS:
/home/[username]/.config/BraveSoftware/
Mac OS:
/Users/[username]/Library/Application Support/BraveSoftware/
Windows OS:
C:\Users\[username]\AppData\Local\BraveSoftware\
When you locate that folder, Copy it to an external USB drive.
Two years ago, for Windows OS users, using the RECUVA application from CCleaner, @CerealLover posted a How to recover bookmarks but no guarantees:
BUT, some say that the CCleaner application itself, cannot be trusted . . . just so you know. I do not know of a connection between RECUVA and CCleaner applications.