The recovery stage depends upon how much you got infected. For example, if a person is having mild symptoms he got recovers fast. This all depends upon the severity cases. I got infected by the delta variant of covid and was hospitalized for 12 days in ICU. My body got lazy unable to run properly, now I am suffering from psoriasis which is a skin problem. The doctor said my body immunity declined after covid. Impurity increased in my blood. so its have been more than a year still I am recovering after the affects of covid.
Treatment depends on your symptoms. You may be given something for breathing, if that's an issue, or for aches and pains, etc. Treatment mostly involves managing symptoms.
Long covid means that you have symptoms after you no longer have the virus. You aren't infectious.
If you don't have symptoms, you don't have long covid.
https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/covid-long-haulers-long-term-effects-of-covid19
https://www.mayoclinic.org/diseases-conditions/coronavirus/in-depth/coronavirus-long-term-effects/art-20490351