It all depends on your goals. How experienced of a lifter are you? An underrated aspect of weight training—especially by those who are not super experienced or for whom lifting is not the primary sport—is that there needs to be progression in the types of exercises you’re doing. Single leg exercises where you’re trying to push the weight are at the advanced end of the spectrum.
Single leg dead lifts are the physiotherapist’s favorite lower extremity exercise. It lights up the posterior chain, improves balance, coordination, etc. etc. To me, that is a distinctly separate set of goals than doing heavy BB RDLs. I do SLDLs as part of my maintenance work (aspirationally completed 1-2x/wk), not my strength training. Single leg exercises I do as part of my strength training include BB Bulgarian split squats, BB step-ups, and BB lunges.
If grip strength is a limiter for DB work, you could get a set of lifting straps. If you have kettlebells, you could try those—I find I have an easier time doing SLDLs with a kettlebell than a DB. I’ll also say that the best exercise for grip strength is heavy bench press.