I think you need to rename the bands are already sufficient. Maybe you need to also add the wavelengths. Otherwise, the LAI operation can’t detect the correct bands.
Here are the needed bands mentioned: Using just required bands and metadata to run Sentinel 2 biophysical processor - s2tbx - STEP Forum (esa.int)
Also, in the algo description the bands are mentioned:
https://step.esa.int/main/wp-content/help/?version=9.0.0&helpid=biophysicalOpAlgorithmSpecification
Marco from EOMasters - Mastering Earth Observation