Is this accurate?
"On this day in 1985, President Ronald Reagan angers Jewish leaders and Holocaust survivors by visiting the Bitburg war cemetery in Germany. Then-German Chancellor Helmut Kohl, who suggested the visit, accompanied Reagan to the cemetery, where 2,000 German troops are buried. Reagan laid a wreath at the base of a monument to fallen German soldiers. What he did not know was that the cemetery included the graves of 49 of Hitler’s infamous SS (Schutzstaffel), the paramilitary organization that planned and carried out the massacre of approximately 6 million people in death camps during World War II. ...
At an American airbase later that day, after having been told of the SS troops buried at Bitburg, Reagan shared his regret over the visit, saying it had “opened old wounds.” Reagan’s advisors later admitted that the Bitburg visit was a fiasco that had tarnished the president’s image."
https://www.history.com/this-day-in-history/reagan-visits-concentration-camp-and-war-cemetery
As a quick answer: The description is not accurate since there was no way Reagan did not know that SS men were buried there. That fact had been reported long before his visit on May 5, 1985. On April 11, 1985 Reagan's press secretary informed the public of the planned visit and soon after it emerged that SS-men were buried there.
As the Washington Post reported on April 29, 1985, while Richard Nixon (!) urged Reagan to go, others didn't seem that overjoyed:
Nixon's advice came as 257 House members wrote West German Chancellor Helmut Kohl last week urging him to withdraw the invitation and 82 senators urged Reagan in a resolution to reassess the Bitburg visit.
In the debate of this resolution several members of the Senate mentioned the fact that SS-men were buried there. In light of this, it is rather impossible that Reagan did not know.
Interesting - I just submitted a complaint to the site about this absurd entry, then stumbled on this question. Of course Reagan knew, as is thoroughly documented - including an in-person appeal from Holocaust survivor Elie Wiesel not to attend.