TMUA practice paper

Has anybody else done the practice tmua papers on the website (the one at the bottom under practice tests: https://www.pearsonvue.com/us/en/uatuk.html)
It's just the 2022 paper in the PEARSON format, but I noticed something weird. After you've finished the 20 questions, you are presented with a review screen which TELLS YOU WHICH QUESTIONS YOU GOT RIGHT. You can then go and change the answers for any questions you got incorrect. That can't be what they do in the real thing right? But why would they include that in the sample test, the point of which was to familiarise you with the system that person use?