Thanks for your question, @Stehlex . What I would do is link a content page (with the sample solution) in the module following your essay test. Then edit the module requirements so that a submission to the essay test is required and that the module requirements must be completed in order.
The embedded screenshot shows what this looks like from the student view. It lets them know that they must Submit the Essay Test and then the Sample Solution will become available to them.
Speaking of solutions, I’m going to mark my response as a solution. There can be more than one. I hope our colleagues here in the Community share other options.
