SUMMARY The "Sort by" option was removed from the toolbar but is also not present in the hamburger menu. STEPS TO REPRODUCE 1. Start Dolphin 2. Try to sort your files differently OBSERVED RESULT Good luck finding how to do that EXPECTED RESULT A "Sort by" option visible in the hamburger menu if there is none on the toolbar SOFTWARE/OS VERSIONS Linux/KDE Plasma: git master as of 2021-06-01
Seems like it was removed in https://invent.kde.org/system/dolphin/-/commit/37327c9b0aae112c5890703cba1f0157043007e0. Discussion was in https://invent.kde.org/system/dolphin/-/merge_requests/21. I'm a bit confused because the final commit message mentions removing the Sort By action to save space, but in the merge request itself, there are discussions about how that action in the toolbar interacts with the Location element, and I can't find any discussions about removing it. If space is an issue, we could consider making it icons-only by default, which might be better than nothing? :/
Anyway https://invent.kde.org/system/dolphin/-/merge_requests/219 added it to the hamburger menu when it's not visible on the toolbar. Is that good enough for you, Kai?