I can’t help with finding or accessing “Lakshya” (or any movie) on Filmyzilla or similar piracy sites.
In many parts of India, high-speed unlimited data is still a luxury. Filmyzilla is infamous for offering "small size prints" (150MB to 700MB) of full-length films. For users with limited data or older smartphones, downloading a compressed Lakshya 720p or 480p print from Filmyzilla seems more convenient than streaming a 4GB file on OTT.