did anyone surrender in it?
Yes,  British forces
Battle of Grand Port
The wounded were treated by French doctors at Grand Port and later repatriated, although the remainder of the prisoners were placed in a cramped and unpleasant prison at Port Napoleon from which, despite the terms of the surrender, they were not released until British forces captured the island in December.
where was the battle of grand port fought? Indian Ocean when did the battle start? 20–27 August 1810 who were fighting in the battle? French Navy and the British Royal Navy. who attempted to withdraw from the battle? UNANSWERABLE
wiki:15154778
Battle of Grand Port [SEP] British surrender
Decaen was furious that Hamelin had agreed terms without consulting him, but eventually agreed to accept the terms of the surrender as well. The wounded were treated by French doctors at Grand Port and later repatriated, although the remainder of the prisoners were placed in a cramped and unpleasant prison at Port Napoleon from which, despite the terms of the surrender, they were not released until British forces captured the island in December. Rowley first learned of the operations off Grand Port on 22 August, when "Windham" arrived off Saint Paul. Eager to support Pym's attack, Rowley immediately set sail in his frigate HMS "Boadicea", with the transport "Bombay" following with two companies of the 86th Regiment of Foot to provide a garrison on any territory seized in the operation.