a while ago, I asked the developer of harbour-tasklist in openrepos and store, if he could provide an aarch64 build version. He told me, he no longer develops Sailfish apps and some other developer should do it.
I know, there is a row of good task and shopping list apps for Sailfish OS, but TaskList fits best to my need.
Is some developer willing to create an aarch64 build of it? You can find the source on https://github.com/Armadill0/harbour-tasklist