King Charles recently returned to “forward-facing duties” and sources claim Prince William is concerned about his dad’s ability to juggle both his role and cancer treatment. “He has been frustrated because there is still so much he wants to achieve,” a source said when asked about Charles’ reign. “He holds himself to very high standards of public service and genuinely feels he’s letting people and organizations down if he’s not out there doing all those public bits of his formal role.” In February, Charles took a step back from the spotlight to focus on his health, leaving William and Queen Ca…
