Yeah, something like that. Since I am quite literally spamming input and retrying, such QoL would really ease some frustration. As for input stacking though, it may be a good idea but would really need play testing to confirm. May lead to some other kind of misinputs, but I just can't be sure on top of my head.
Speaking of misinputs, probably a undo button would also be nice
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I got an undo request from another review as well but I don't think it fits my game, my puzzles lure you into soft locks that you have to restart out of, having an undo just mitigates that effect. The idea is to make the player realise their mistake, and give them a fresh start so they can apply their new learning properly.