Event Data Items in Analysis

Not able to see all data elements in the event data items from the Capture program,

How to do that ?

Would you please explain a bit more what you are trying to do? What app are you using? If you mention the version of the DHIS2 instance that you are using and a screenshot could help too!

I logged in to play.dhis2.org instance version 2.36.4, and got all the dataelements in programs see API link: https://play.dhis2.org/2.36.4/api/programs.json?fields=id,displayFormName,displayName,description,relatedProgram[id,displayName],programStages[dataEntryForm[],programStageSections[id,displayName,description,sortOrder,dataElements[id]],programStageDataElements[,dataElement[*,optionSet[id]]]]&paging=false&filter=id:in:[IpHINAT79UW]

where id:in:[] is the program id, are you looking for something similar to this? Thanks!