Good find! I too came to proclaim this sauceless. However, unlike Lead Stories, which says, "Searching for Kennedy's name in the Supreme Court's docket search resulted in zero cases," I did find his name in a couple recent cases though not docket-searchable. He applied for stay in Doe v. Zucker, which Sotomayor rejected (https://www.supremecourt.gov/DocketPDF/20/20A135/167020/20210122152300636_Application%20for%20Stay.pdf). This speaks of "irreparable harm", but only generically, such as missing days of school.

More interestingly, he also filed amicus in Garner v. Biden (https://www.supremecourt.gov/DocketPDF/21/21-1511/229360/20220705114132178_CHD%20Amicus%20Brief%20for%2012-1511.pdf), which appears to have been quietly dismissed by the Supremes. There RFK argued, "There is no question that the experimental COVID-19 vaccines are unavoidably unsafe for many people and carry great risk of irreparable physical harm, including death, in light of the latest CDC’s VAERS data cited above." The memer cited here probably was one of those who never learned in high school how to tell which person is writing the docket item, which is a skill that you have to pick up in the first year as a paralegal. You see this same ignorance posit itself whenever there's a USSC ruling and media has multiple conflicting takes on it: they've just read the authorship wrong and it's their own fault.