I spoke to someone today getting more than $30k off a 2019 Model X with list price of $107,000 (to move "inventory cars). Heavy discounting is not unique to JLR in the current EV market.
Last quarter Tesla introduced an update to S/X utilizing more efficient motors and adding an adaptive suspension. Model X range was increased to 325 miles. I'm not surprised there are big discounts on the older version cars left in inventory.