Hey @Sukumar Vinnakota ,
Currently based on my understanding, there is no direct way to achieve it.
you can follow the below process:
You can create a lookup table with all the necessary dates containing the 7th work day of every month.
Trigger the ADF on 7th, 8th, 9th ,10th and 11th of every month as 7th work day would definitely fall among these 5 days.
within ADF have a lookup activity to compare whether the day on which the ADFs are triggered are equivalent to the lookup value from the table.
If yes, proceed with other executions else exit.