Did you only copy over files in the Palettes folder?
The out-of-the-box tool palettes for US Imperial content for the 2023 release are installed here (if you do not redirect them elsewhere):
C:\Users\YOURUSERNAME\AppData\Roaming\Autodesk\ACA 2023\enu\Support\WorkspaceCatalog (Imperial)\Palettes
(The name of the WorkspaceCatalog (Imperial) will be different for other content. The numeric portion of the ACA 2023 folder will vary for other releases.)
But the Palettes folder files are not all you need. The WorkspaceCatalog (Imperial) contains a file called ADTSamplePalettes (Imperial).atc. Did you copy the equivalent of that file from the old machine to the new machine? ACA looks to that ATC file (AutoCAD Tool Catalog file) to determine what palettes to include. If you just copied files into the Palettes folder that do not have a GUID that matches one in the ATC file, then those Palette files will not be seen.
The image below shows the contents of the ADTSamplePalettes (Imperial).atc file on my computer, with the first Palette expanded to show its contents. The URL property points to the ATC file that defines the Design palette referenced.

Do not mess with the Ribbon Tools.atc file that may also be in the WorkSpace Catalog folder. That defines tools that the Ribbon uses for AEC content tools.
David Koch
AutoCAD Architecture and Revit User
Blog | LinkedIn
