All serious gym-goers are eventually impacted by grip strength imbalance at one point, and as the old saying goes, "You're only as strong as your weakest link".
I'd suggest you buy a pair of heavy hand grip strength trainers from Amazon (don't buy anything below 100lbs) and start using them in your spare time. At the gym, start mixing up your grips, doing dead hangs at the end of pull/chin-up sets, and farmer walks with the heaviest dumbbells you can manage.
Try a pair of hand grippers, something like these.
https://www.amazon.com/dp/B0031TRZTG/ref=cm_sw_r_cp_awdb_imm_9178TT68S8VDG48QPR95 Adjustable ones are good if your just starting out and add in some wrist curls and reverse wrist curls. All 3 of those exercises will focus on your wrists and forearms. I really like these 3, I get a good pump in my wrists and forearms and leaves them feeling hard as a rock.
or would just increase volume w/ wrist curls, farmers carries, no straps, etc be more effective.