Get GymRun! That's what I use for weightlifting. It also shares the workout + HR + calories to Samsung Health!
Even though I don't pay much attention to calories burnt it's still better to undershoot than to overshoot! But I fully agree with you. I've been contemplating moving to Apple's ecosystem because the app ecosystem is WAY more refined and robust. Plus the Watch 8 or Ultra are the absolute best with sensors (see Quantified Scientist reviews on youtube).
The only reason I haven't moved over yet is because the Galaxy 5 Pro has great battery life and from what I've seen Watch Series 8 basically has to be charged every day :S which is a pretty big L from Apple in 2022.
Maybe next time. Regardless, I actually prefer a very basic UI like GymRun on the Watch (less battery drain, less distractions) I just want to set my reps etc. My only gripe is that you can't switch exercises mid workout (on the watch), say all bench racks are full, so you decide to do dumbbell presses instead, no way to change that mid workout unless you edit it after you finish it (as far as I know).