Surely, particularly with the majority of multi-engine aircraft having two engines and thus two throttle levers, it shouldn’t be too hard to have 1 click-spot for each, on the outer end of the lever, and a combined click-spot, somewhere between the two? Perhaps similar to how Fenix manage the landing light switches on their A320?
For aircraft with more levers, 747/A380 for example, a click spot above the centre of those levers would move them all and individual click-spots, say below the centre of each individual lever.