Here's a list of PRs which I think are missing what's new entries for v1.0.

I've pinged the author of the PR, or the reviewers if the author is not a maintainer. Please let me know if some of them don't need an entry or I've missed something.

• More stable n_init runs for KMeans (More stable n_init runs for KMeans #20200) @jeremiedbb
• Make BaseShuffleSplit public (Make BaseShuffleSplit public #20056) @NicolasHug @rth
• FIX Uses points instead of pixels in plot_tree (FIX Uses points instead of pixels in plot_tree #20023) @thomasjpfan
• FIX CountVectorizer does not check for lowercase in vocabulary (ENH CountVectorizer does not check for lowercase in vocabulary #19401) @ogrisel @rth
• API Removes tol=None option from HistGradientBoosting* (API Removes tol=None option from HistGradientBoosting* #19296) @thomasjpfan
• BUG Fixes fetch_kddcup99 for return_X_y and as_frame (BUG Fixes fetch_kddcup99 for return_X_y and as_frame #19011) @thomasjpfan