Why isn't Indian food popular among non Indian people in most Europeann countries, compared to Italian food, Chinese food, Japanese food, Thai food?

Many of my non Indian friends like Italian food, Chinese food, Japanese food, and Thai food. But they aren't exposed to Indian food as well. This is the case here in most European countries except UK and Ireland. They even know about boba (bubble tea) than mango lassi. This applies to my White, along with my Black and my East Asian friends too.

What will it take for Indian food and food to reach the popularity that Italian or Chinese or Thai or Japanese do?

Why isn't Indian food popular among non Indian people in most Europeann countries, compared to Italian food, Chinese food, Japanese food, Thai food?
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