Description of the requested feature
Currently there is no way to initialize the pfe-collapse-panel inside pfe-collapse with the initial expand/collapse property. If you try to set pfe-expanded on the pfe-panel, still the component will always open in collapse mode. My guess is this is because of the logic written here
https://github.com/patternfly/patternfly-elements/blob/master/elements/pfe-collapse/src/pfe-collapse.js#L237
Impacted component(s)