I've also seen it stand for Make Israel Great Again, given the unwavering support for Netanyahu and his agenda from the administration

I see Google's AI and top results all give this answer, but "MIGA" most certainly does not refer to India in this or most contexts, but to Israel. It is a criticism of Trump's pro-Israel actions, and presumably Google recognizes its anti-semitic usage and so will not suggest that as an answer unprompted.

I'm pointing this out specifically because I'm surprised to see that Google and also DuckDuckGo both suppress the true definition if you don't already know it.