Why doesn't "Sync Everything" actually sync everything?

Taken from here: https://www.reddit.com/r/brave_browser/comments/1f1mgoq/why_doesnt_sync_everything_actually_sync/

By this, when syncing to a new browser, I still have to run through the setup and disable all the crud I’d already disabled on every install…

Enter the sync code… Select “Sync Everything”, then wait a bit…

Then go and: Settings → Apperance:

  • Disable:

  • Show Bookmarks button

  • Show Brave News button

  • Show Leo AI button

  • Show Brave Rewards button

  • Show Brave Wallet button

  • Enable:

  • Use wide address bar

  • Always show full URLs Change:

  • Tab hover mode → Card with preview

Settings → Privacy and security:

  • Disable:

  • Allow privacy-preservice product analytics (P3A)

  • Automatically send daily usage ping to Brave

Settings → Leo:

  • Disable:

  • Show Leo icon in the sidebar

  • Show Leo in the content menu on websites

Settings → Languages:

  • Enable:

  • Use spell check for (all options)

Settings → Downloads:

  • Disable:

  • Show downloads when they’re done

Settings → System:

  • Disable:

  • Continue running background apps when Brave is closed

That’s my set of settings - none of which are actually synced when “Sync Everything” is selected.

Why does it miss so much?