The indestructible Samsung Galaxy S5 SM-G900F ‘klte’ still enjoys great support from various maintainers. I know that the leading LineageOS Head Developer Kevin Haggerty aks @haggertk is already working on LOS 18.0 internally.
But right now the ROM of @itsclarence is more important. The installation of the ROM e-0.12-q-20201020-UNOFFICIAL-klte including the (not current) microG Services Core v 0.2.10.19420-77 was, how could it be otherwise, without complications.
Next step was to manually update microG to Corona-Covid-19 compatible GmsCore 0.2.12.203315.
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As a test app, the current version of the DUTCH Coronamelder 1.0.4.75234 dated 26.10.2020 was installed and successfully activated.