Paclets in the WLPR need to have PacletInfo files written in the
PacletObject[<| Name->"xxxx"... |>]
style instead of the older Paclet[Name->"xxxx"] style. I don't think that PacletObject is supported in versions by 12.0 and earlier version. So even though you could look at the ResourceObject metadata, find the CloudObject containing the .paclet file and use
PacletManager`PacletInstall
on that file, I don't think it would work.
