I’ll tag in @Mattches on this, but I would say I don’t think it’s possible to do what you’re asking. When they are suspended, hibernated, or whatever…they don’t send any information. They are as good as closed. So when it’s sending info to Sync, it’s just going to see whatever is active and that’s synced.
You could technically bookmark open tabs and that may sync, but that’s about all that I’m aware. Curious to see if Mattches will be able to provide any potential solutions to this, if essentially confirms what I said, or what? Also might just be more of what should exist as Brave Feature Requests rather than a support issue.
@Saoiray@Mattches I should have stated in my original post - I’m pretty sure sync used to work even with suspended tabs. It’s been at least 6 months now, but I once synced 500 tabs. I wasn’t paying attention at the time, since it all worked, but I’m pretty sure a large portion of those tabs were suspended.