Yes people did get long Covid before vaccines. There are multiple suggested protocols. Here is one
https://covid19criticalcare.com/covid-19-protocols/i-recover-long-covid-treatment/
The person that I know that has “Long Covid” had it before she had Covid. She was a devout mask Karen but still managed to get the Chinese Bioweapon. 25 years old. Really into drama and lethargy when she was younger. She had started gaining weight which could be RX psych drugs before Covid and has increased that.
It sounded more like Depression than Covid. I was hit by a bout of Depression after getting Swine Flu.