Because the code is not provided under a free/open-source license, and therefore does not meet the requirements for the main F-droid repo.
replyAh interesting. They use the "FUTO source first" license. https://github.com/futo-org/android-keyboard/blob/master/LIC...
replyOpen source with limitations on commercial use.
Technically it's "source-available", not "open-source".
replySimple Keyboard is on F-Droid too. Supports moving cursor via space bar.
replySame for HeliBoard
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