We recently updated the @fdroidorg Inclusion How-To with a new section explaining why we consider #ReproducibleBuilds to be best practice and are hoping developers will support our efforts to make as many (new) apps reproducible as we reasonably can (whilst hopefully making sure it's clear this is not a mandatory requirement):

f-droid.org/docs/Inclusion_How…

Inclusion How-To | F-Droid - Free and Open Source Android App Repository

This page documents how a new application gets included in the main F-Droidrepository. It includes the technical details that a submitter should beaware of.A...

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