Rash without fever due to covid is very common sir .However if there is no fever it is a post covid harmless symptom. Hydrate her well.
Next Steps
Avoid sweat
Keep dry
Put cold showers twice a day
Take Tulsi decoction daily
Take steam inhalation with Karvol plus eucalyptus oil capsule twice a day
Take Tablet Levocetrizine twice a day for 5 days
Take Tablet Atarax twice a day for 5 days
Momex ointment for local application on rashes three times a day
Avoid the temptation to itch to avoid secondary bacterial infection
Health Tips
If between fingers intertrigeous folds are itching it can be scabies.