Direct-drive wind turbines ring their generators with hundreds of kilograms of NdFeB magnets per megawatt. India's listed turbine makers use geared designs that need far less.
Generator makers fit permanent magnets around the rotor of direct-drive or medium-speed turbines. Geared turbines with doubly-fed induction generators (DFIG) use electromagnets instead and need little rare-earth magnet.
Globally, wind is one of the biggest magnet users after EVs. In India the exposure is lower than it looks: Suzlon's S144 uses a DFIG generator, so the scheme matters to Indian wind mainly through components like pitch and yaw motors and any future shift to bigger direct-drive machines.
Turbine makers earn on the turbine order, not the magnet. A domestic magnet source would matter most if India moves to larger (5 MW+, offshore) turbines, which are almost always permanent-magnet machines.