The conventional advice of doing compounds doesn't work for everyone though IMO for their arms.
My father was in his prime 75kg, <10% bf, only 5'6, and a top judo player.
Could bench more than double his bodyweight; do chins and dips with his entire weight attached; dead lift over 200kg, and yet (I'm basing this on photos of him at that time and what he's told me) never had large arms, training them maybe one exercise after his compounds
Had massive shoulders, chest, back, and decent legs (for a 5'6 natty 75kg person) but quite small arms.
Unfortunately this compound failing to stimulate arms problem appears heridatory lol - although I'd need to gain 5kg of LBM to get to his former size