i think your pics is referring to rhomboids not traps.
romboid rows concentrating on volume and form, otherwise incline bench dumbbell shrugs and plate shrugs thrown in after every back / shoulder set. In addition to the staples bbl shrugs, behind back bbl shrugs and other compound back exercises.
whenever I do back now it's back/traps or shoulders is now shoulder/traps, always superset to get the volume each week.
I couldnt get mine to grow until i smashed them with volume and work them until they burn, plate shrug burns too at the end of each set seems to work.
Check YouTube on form for example shrugs should go up then at an angle up/back as they are not only used to raise weight but also pulls them back and up.