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.
Wind-turbine maker; its DF-series turbines use doubly-fed induction generators (DFIG), which need little rare-earth magnet
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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.