Diamond Member "Peacock Premium, on us" Activation Process

There seems to be no way for Diamond members to activate the free Peacock Premium reward. I have tried every suggestion in this support forum and find that the links to click on are not in my account once I log in. I also cannot send a direct message as suggested in a post from February 2026. I realize the entire rewards program was revamped earlier this year so I'm wondering if this reward is still available? If so, how do Diamond Members activate it as of April 2026?