What are the opposite words for under development?

The antonyms for the phrase "under development" are "completed," "finished," "perfected," "mature," and "established." These antonyms signify that a particular project, product, or system has undergone all the necessary stages of development and is currently in the completed or final stage. The opposite of "under development" suggests that something has reached its potential and is now operating at its full capacity. This stage of development is an essential milestone for any new initiative, and these antonyms signify a sense of accomplishment, pride, and satisfaction. By reaching completion, an initiative can move on to its next stage of growth and progress to achieve even greater success.

Antonym of the day

were one back
aid, discourage, dissuade.