I'm not sure what you want to edit the surface, but I think you can do.
If you have points, you can add them to the surface. If you delete any point, I have a idea to do that.
However, if you use Trimble Business Center for Free, you cannot use those feature. You need to purchase the license.
And I'm worried you use BC-HCE because that was EOL several years ago. That never be used on Windows 11 or later.