Baby doesn’t bond with anyone but primary caregivers as a newborn. They have no object permanence, so once you’re out of sight, smell and hearing range, you no longer exist. Visitors are of zero benefit to baby, and actually a risk factor, in terms of viruses, etc. When today’s grandparents had babies, Covid wasn’t a thing.
If grandparents are destroyed by having to put the needs of the new parents and the health of the newborn ahead of what they want, then they’re clearly not able to respect boundaries. Grandparents aren’t the focus after a baby is born, and shouldn’t be.
You can’t be supportive while shrieking about not getting what you want.