Currently it's only possible to define a born event and a return event in a retention metric in Avo. But it's not possible to define the time unit and time window. For example is the user born on day 0 or month 0. And is the user returning on day 7 or month 3.
It would be helpful to be able to define that in Avo, to keep Avo as a better source of truth for metric definitions.