is there any way to sync my google account with vivaldi?
@khfaji No, I'm sorry. There's not, and will not be.
Google is a huge privacy offender, the changes necessary for Vivaldi to sync with your Google account give Google too much control over the browser and a user's data, so Vivaldi will not be doing that.
@khfaji To sync to Google Services a paid access is needed.
And i guess these regular fees (per year and browser installation) can not be funded by Vivaldi.