Are you sure it's the lockdown and not only that the lockdown makes you more aware of the danger of the virus?
But with everyone talking about health, the virus and the pandemic, it seems obvious that more people become aware about their own health.
What messes with me is the missing human contact in person. Skype/Zoom just isn't enough.
Young and healthy lowers the probability not just of dying, but also of a severe course of the disease. Long-term COVID symptoms largely correlate with how severe the course of the disease was. This is something that tends to be emphasized by the actual research, but left out of mass-media reporting, perhaps for the sake of sensationalism.