應該有exemption
You may have noticed from the previous point around Final Qualification places that a serial-winning Grand Slam champion could miss out on qualification if, say, their ranking on 10 June was lower than four other players from the same nation who all qualified by direct acceptance.
In this example, and we'll use Rafael Nadal here as it may indeed apply to him, the door is not closed to qualification. If Nadal were not among the top 4 Spaniards come 10 June, he could use his protected ranking to ensure he does feature among those four. He would, however, also need to apply for an exemption to the ITF Olympic Committee (given he has not played Davis Cup since 2019), but would be hopeful with his lengthy time out through injury and an enviable Olympic and Davis Cup record to point to.