Hi. Is lymphadenopathy in ars generalized or it can be localized (e.g. right submandibular gland)? Is it possible non itchy ars rash at 7wks post?

Generalized. ARS lymphadenopathy is generalized, never localized to one area such as the submandibular area. And 7 weeks is much too long for an ARS rash, which always occurs (along with other symptoms, including lymphadenopathy) within a couple of weeks of infection.