Chrome Bookmarks Lost after Chrome Update

I use Chrome rather than Safari for browsing.

Following a recent Chrome Version Update, I've just noticed that all of my Chrome Bookmarks have vanished, and there does not seem to be anyway of rolling back the Chrome Update.

I had not backed-up Chrome Bookmarks (and don't know how that would be done).

I failed to notice the missing Bookmarks immediately, and (since the Chrome Update) have emptied my Bin (so nothing in there).

I've looked for 'Bookmarks' and 'Bookmark.bak' files in:

Mackingtosh HD\Library\Application Support\ but can't find either.

I was wondering if my Chrome Bookmarks might be automatically backed up to my iCloud Storage Plan.

However, when I go to iCloud Drive in Finder, it only lists the following (which I assume is all that is being backed-up, correct?)

Documents

TextEdit

Desktop

Pages

Preview

Shortcuts

Q1. Is there anywhere else where Chrome Bookmarks may have been automatically backed-up to?

Q2. Though reluctant to use Chrome Bookmarks in future, I'll probably end up doing that, and would like to know how best to back-up Chrome Bookmarks?

Thanks (in advance) for any suggestions / comments - much appreciated.