Obviously the data is preliminary, since the first subjects were only infected 11 months ago, and the most vulnerable (aka the elderly and immunocompromised) make up a very large percentage of the critical data we have. That's because you don't get to go to the doctor when your symptoms are mild, and those people are often refused care, especially if they don't fall into a high-risk demographic.

As "critical" infections dwindle and the number of infected and tested increase, the current thinking is that there will be issues cropping up throughout the recovered-person's life, due to these other effects.

(Note that "long-haulers" - those with sustained, long-term COVID symptoms - are a different class.)

There are two good studies I recently found, from the Mayo Clinic and Harvard, which look specifically at the long term damage to heart, lungs, and brain function, and what that might mean for young people who get it and recover.

https://www.mayoclinic.org/diseases-conditions/coronavirus/in-depth/coronavirus-long-term-effects/art-20490351#:~:text=COVID%2D19%20symptoms%20can,within%20a%20few%20weeks.

https://www.health.harvard.edu/blog/the-hidden-long-term-cognitive-effects-of-covid-2020100821133

Again, these are Ns of under 10 for now, because it hasn't been a long time, and infected young people are grossly underrepresented in the data we have today.