The cable machines are great but they as you’ve found can be easy to max and really don’t train the add and abductors to properly stabilized, single leg lift and lateral lung lifts can keep building those muscle and you’ll feel great. They will humble you first tho

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Go super slow and hold for like 3 seconds at the open. leaning forward vs back also hits different muscles so play around a bit

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Try leaning forward or back on it different than what you have been doing. Make sure you go slow. Lifting super fast doesn't build muscle so much as it just depends on a burst of energy to do most of the work. I'd still maxed then try using the cable for it while standing

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If you’re sitting all the way back in the seat, I promise you won’t be maxing it

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