Leg length discrepancy is very common amongst the population. For walking/running it’s generally not an issue because the pelvis is not fixed and will accommodate discrepancy
On the bike, the pelvis is fixed at saddle and cannot accommodate the same way.
Whether a physical (femur or tib/fib) or functional (muscular/tight ligament or asymmetrical presentation) it does not matter as end result is same
On my road bike shoes I have 3 Bikefit leg length shims under my left cleat, my saddle is set on the extension of my longer right leg. The difference is simply unreal, I’ve been riding bikes 30 years and have never experienced such symmetry in leg function and power output.
Well worth having investigated by an experienced bike fitter familiar with foot correction and length discrepancy
It’s not something cured overnight as many have been riding for years with lld and the body requires a reset in the cpg in terms of muscle memory, my shims were installed over a week with soft rides and increase to saddle height