Algebraic effects are not part of the language implementation, but there are libraries like fused-effects[1] that implement them. Row polymorphism has been proposed a few years ago [2], but as with any community effort, the timeline and possibility of the actual implementation depends on the amount of attention put into it instead of some other (probably important, too) work.

[1]: https://github.com/fused-effects/fused-effects [2]: https://github.com/ghc-proposals/ghc-proposals/pull/180