Make a marinade for the watermelon by combining soy sauce, vinegar, sesame oil, maple syrup, lemon juice, minced garlic, sliced scallion and sesame seeds in a bowl.
To prepare the watermelon poké, add watermelon slices in a big bowl or a zip log bag, along with the prepared marinade. Mix well and seal or cover.
Let this marinate in the refrigerator for 3-4 hours or overnight.
Once the watermelon poké is ready, assemble the bowl by adding cooked rice to the bottom.
Then, on the top add watermelon poké along with other toppings like avocado, carrot, red radishes, edamame, parsley leaves, lime wedges. Sprinkle sesame seeds on top.