Hi @romanuel ,
Please use the addDays function to add the number of days to a specific date.
See the below examples where we add a number of days to date.
Add 5 days to today's date and format the date in dd/MM/yyyy format.
formatDateTime(addDays(utcNow(),5),'dd/MM/yyyy')
Similarly if you want to add days to any date please replace the utcNow() expression with the date in your flow.
For Eg. The below formula adds 1 day to the Start Date.
formatDateTime(addDays(outputs('Start_Date'),1),'dd/MM/yyyy')
Hope this helps.! Do give this answer a thumbs up if this is helps and accept this as a solution.
Thanks,
Sanmesh