Is the "targeted muscles group" function working

I workout 4 x a week, and i am trying to hit bi's and Tri's heavily for a few months, (damn genetics and long arms). I have the muscle group selected as "targted" but gravl seems to ignore that, (unless its suggesting other exercises as usual but emphasising exercises that have a secondary impact on Bi/Tri).

Currently manually adding exercises every session to deal with the issue and moving them to the start of the session by re-ordering the list.

But its starting to feel like I would be better served with a recurring traditional program as I am basically undoing a lot of the good work the AI used to do for me?