Current the countdown html has no aria attributes to tell screenreaders what to do. Personally, I’d just set aria-live to off on the whole thing, but other users may want certain numbers read out. (just not the seconds, for the love of god).
This can obviously be done with custom JS, but most users dont have that skill level.
ADA compliance is essentially mandatory for all USA based business websites these days, so going the extra mile to make Pro ADA compliant would be a big plus.