Genuine question, what is stopping you from identifying as another caste in 2022 with the mass adoption of the concept of identifying with different genders? Just like being assigned a sex of Male or Female at birth, those who don’t want to associate can identify with another gender identity or even transition their bodies to whatever sex they please. I don’t buy the notion that once a Dalit by birth you are destined…
Since this is a genuine question, there’s something you should know about not conforming to the gender you were assigned at birth: we’re not accepted for our identity either. The concept of self-identification is separate from cultural acceptance of it.
Moving to a place, however unrealistic the prospect, where autonomy in identity is more common doesn’t automatically make it safe or practical. Generally speaking, people who would benefit from emigrating, and can, already do. And they’re facing much more entrenched biases of racism and xenophobia.