Why Adapt UI button is visible in some system but missing in some other system






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Then we do the same check on another system where Adapt UI is missing, here the plugin configuration is missing. As a result, this button missing issue is not caused by inadequate user authorization, but the needed plugin is not returned by server side.
For more detail about server side configuration and how I finally manged to make this button visible, please refer to this blogĀ Fiori launchpad page server side configuration.
Runtime adaption is missing in 1.38.X, is it supported only in 1.40.X / 1.42.X version only ?
PS - Context is HCP and not on-prem.