Place the cooked sushi rice in a bowl and gently fold in the rice vinegar until well combined.
Slice the sushi-grade salmon and pressed firm tofu into long, thin strips approximately 1 cm thick.
Julienne the cucumber into thin matchsticks and slice the avocado into long slivers.
Lay one nori sheet on a bamboo rolling mat and spread half of the rice evenly over the bottom two-thirds of the sheet.
Arrange half of the salmon, tofu, cucumber, and avocado in a horizontal line across the center of the rice.
Lift the edge of the mat and roll tightly over the fillings, applying gentle pressure to create a firm cylinder.
Repeat with the second nori sheet and remaining ingredients, then use a sharp, damp knife to slice each roll into 8 pieces.
Serve immediately with coconut aminos, pickled ginger, and a touch of wasabi.