Why D-Day did not need seaplane tenders

Why did seaplane tenders play little part in the D-Day landings?

Land-based aircraft already provided ample coverage, and aviation ships would have added risk and congestion without enough benefit.

Operation Overlord took place within range of a vast land-based air arm in Britain. Extra carriers or tenders would need protection and logistical support while adding little useful aircraft coverage. Their movements would also require cleared channels and operating space in crowded waters. British airfields could supply the necessary aviation without adding those demands to the landing operation.