As topic states, unable to locate them
Sync on Windows and iOS is a sore point with many of us. Sync to iOS I believe only syncs bookmarks. Open tabs between Windows computers is a joke. A limited number of tabs only sync not all Open Tabs.
There are a few issues on github:
Yup been like that since Aug 2020 when Sync v2 was released. Seems Sync v2 was rushed out the door to replace SyncV1 which had been disabled due to severe issues with it. MS Edge does not have this issue so its not inherent in Chromium based browser.