UEFA is considering the introduction of innovation from 2024. 

The management of the organization is in favor of the fact that Eurocup matches should consist of one match, not home and away matches as before. UEFA has approved the coronavirus pandemic qualifying and playoffs in one match. 
This was confirmed by the Secretary-General of the organization Giorgio Marketi: "We must never exclude those who have potential and value. We know that we have to take into account many factors, such as the calendar, organizational constraints, fan participation, economic impact. But we will definitely explore this format and possible options in the next discussions. The fact that the stages in which the losing team stops fighting consists of a one-game duel, which leads to surprises and emotions. We have received excellent feedback from clubs, broadcasters and other partners, as well as fans. Events have made this format necessary for us. But the result was satisfactory."

(Passport)