Update: While it states there are 511 bookmarks, the export only has the ones shown on-screen. So something is breaking the listing of them. However, they're clearly being used as URL hints; I can look at my backup file from December, input a partial URI and it suggests/completes it.
So looking at the favorites.plist, I realized the Bookmarks folder is not displaying.

It isn't empty; I can see quite a few bookmarks with 2 as the parent.
So... I started it in cli-mode. There are a few exceptions.
Error in loading website data: Error Domain=NSCocoaErrorDomain Code=260 "The file “wt_data.plist” couldn’t be opened because there is no such file." UserInfo={NSFilePath=/Users/tony/Library/Application Support/Orion RC/Defaults/wt_data.plist, NSURL=file:///Users/tony/Library/Application%20Support/Orion%20RC/Defaults/wt_data.plist, NSUnderlyingError=0x6000025c4b40 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}
A bunch of instances of:
Database Error: The operation couldn’t be completed. (Orion_RC.DatabaseError error 18.) query: INSERT INTO touch_icon_unavailable
(PAGE_URL)
VALUES ('amazon.com//favicon.ico')
error finalizing prepared statement: UNIQUE constraint failed: touch_icon_unavailable.PAGE_URL
for different web addresses.
But the interesting one is when selecting Boomarks - Show Bookmarks:
2025-01-30 20:40:43.344 Orion RC[17681:23581953] *** Illegal NSOutlineView data source (<Orion_RC.BookmarksViewController: 0x60000128ddc0>). Must implement outlineView:numberOfChildrenOfItem:, outlineView:isItemExpandable:, outlineView:child:ofItem: and outlineView:objectValueForTableColumn:byItem:
It isn't telling me what data it's failing on, but it looks like it's not parsing a bookmark correctly?