Biden could approach and pay respects, but WAS NOT allowed to 'lay' the wreathe

For comparison, here are past presidents, actually elected and recognized by the US military as their commander in chief. Wreathe is presented for the POTUS to lay, rather than already there to begin with.

Here's Trump

And Obama

And Bush

And Clinton

And Reagan

Only Biden was denied the laying. Could approach and pay respects, but not lay it. Aligns with being a foreign dignitary rather than the POTUS.