I see the INSTALL button right there, what’s the problem?
Albeit, that app is useless on latest microG and your Graphene device does not have microG anyway.
I see the INSTALL button right there, and the text say something about being build, IF an app is not installable on your device… you won’t see an INSTALL button.
Workaround for what? Press the INSTALL button.
what? wrong forum…
obligatory read: Reaching targets and mixed locales | F-Droid - Free and Open Source Android App Repository