I know this has been suggested before, but the feature that would be even more specific and useful to me is if I could customize the calendar attached to ClickUp to create company holidays, so when the date calculator determines the end date based on number of days, it would take in consideration all weekends, holidays, and company specific holidays when determining the actual end date. I am including a link to a date calculator website. If you click on "calculate in business days," you will see the feature I am talking about. https://www.calculator.net/date-calculator.html
I currently use Zoho Projects and while it is lacking several of the features I like about ClickUp, the one feature it has that works well for me is the ability to customize the calendar and use it to determine end dates based on adding start date and a number of days. https://help.zoho.com/portal/en/kb/bugtracker/settings/portal-configuration/articles/date-time-settings-4-1-2021#Date_Format