I'm already hearing about protests and actions being planned in my area, and some talk about how this summer's reaction to it could be similar to or bigger than 2020. Personally I don't know. The 2020 uprisings were global because white supremacy and police brutality are global, but I feel like the US is so particularly backwards regarding abortion that you'd have a hard time getting protests going in other countries where the right to choose is more well-protected.
I think the obvious reasons in the global north were that last year and last summer in particular seemed like a turning point for the better - the economy (or at least the stock market and job growth) was doing better than ever, and people thought we were winning and really past the pandemic with vaccines (as opposed to now when they declare it, but everybody can feel things are shit regardless of how they feel about COVID)
I couldn't speak to the experience in the global south