You can follow the contents in the link below to activate Cache Buster for SAP Fiori Launchpad and SAP Fiori apps:
After that, you can use the way in the solution part to check whether Cache Buster is working correctly in Fiori Client.
SAP Fiori Client
cache, buster, fiori client , KBA , MOB-FC , SAP Fiori Client Native Mobile Application , Problem
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