It is quite imperative that you practice a lot of quality questions, like the ones we provide at Edutrainex. These questions include the answers and explanations for why they are correct, which leads to a more thorough understanding of the reorder paragraph task. It just takes some guidance and practice to master the reorder paragraph questions. You will see a single box with a jumbled paragraph, and another empty box with the sentences you need to place in the correct order. The time allocated for this task is not provided, so you are expected to manage your time yourself. We recommend that you spend no longer than 2 minutes per reorder paragraph problem.
Each PTE reorder paragraph question is based on the concept of paragraph coherence, which means each of the sentences is connected in some way to the others. One sentence is always considered the topic sentence and is independent from all the other sentences. It's crucial that you identify the topic sentence, so that you can use your understanding of grammar to identify the remaining sentences. Reusing nouns, using transition words, and replacing nouns with pronouns can help make a paragraph coherent. You only need a decent amount of practice to master reorder paragraph questions. We at Edutrainex provide our students with benefits not just in the PTE task but also in the rest of their English skills. Grammar is essential for all PTE tasks, including this one, so our goal is to help our students improve.
For More Info:-

https://edutrainex.com/blog/pte-reorder-paragraph/
https://youtu.be/qHE3QDXudG8