Cohort analysis Day 0

Hi all

I created a cohort of first time launches. Over this cohort I want to see how many of these users did an action.

See the table below, on Aug 1, I had 166 unique users opening the app for first time (First Launches), over these 166 unique users 4 did an action on August 2nd. But, how can I know how many of the 166 users did the action on the same day first time open (Day-0)?

Based on what I read here, day 0 is not included in the cohort: https://experienceleaguecommunities.adobe.com/t5/adobe-analytics-questions/definition-of-1-days-in-cohort-tables/qaq-p/329144

Otherwise this give an uncompleted analysis, even more if I look at the rolling cohort.

I appreciate any help.