There was at least another olympian who tested positive that said he has had extreme fatigue even weeks later and he has lost a lot of strength.

A lot of constant training required to be an olympian.

Not really sure. There seems to be evidence that symptomatic cases have long term effects on lung capacity.

They all train every day, so I think even a month out would fuck up their preparation. Especially if they give their coach COVID.

At the Olympic level, missing multiple weeks of training in the ~year before competition probably eliminates you from medal contention.