What is the status of KIO S3?

Does anyone know the status of KIO S3? Is it installable? Does it work?

I’m running kubuntu and apt search returns no results for it, but the kde page and source repo suggest its alive, but I can’t find an installer anywhere.

Any hints appreciated.

Thanks

It hasn’t been ported to KF6, so it is incompatible with latest Dolphin/plasma.
It is not very actively maintained, but there is not real reason why it wouldn’t work in plasma 5.
Its Readme file is helpful regarding the support it provides.

It has an arch package.
https://aur.archlinux.org/packages/kio-s3