Synthetic setup, no stored validation.
Sheet1 H1 Allowed status; H2 New; H3 In progress; H4 Blocked; H5 Done.
A1 Task; B1 Status; A2 Draft; A3 Review; A4 Send.
Name H2:H5 StatusChoices. Apply Cell range validity to B2:B4.
Optional H6 Waiting requires extending the named source.