Cook jasmine rice according to package instructions and set aside.
Slice the pork tenderloin into small, bite-sized cubes and season evenly with garlic powder, ginger powder, sea salt, and black pepper.
Heat sesame oil in a large skillet over medium-high heat until shimmering.
Add the pork cubes to the skillet in a single layer and sear until golden brown and cooked through, approximately 5 to 7 minutes.
Steam the broccoli florets in a steamer basket over boiling water until they are tender-crisp and bright green.
In a small bowl, whisk together the gochujang and tamari until smooth.
Pour the gochujang mixture over the pork in the skillet and toss to coat, allowing the sauce to bubble and thicken into a sticky glaze.
Thinly slice the cucumber and toss with rice vinegar in a small bowl to create a quick pickle.
Assemble the bowl by portioning the rice into a bowl and topping with the glazed pork, steamed broccoli, and pickled cucumbers.