On the dashboard
The Analytics tab shows the last 7, 30 or 90 days: member count, messages per day, joins and leaves, the most active channels and members, moderation actions per type and per moderator, how many members are at each level, and retention (how many new members are still here after 7 and 30 days). Hover any chart for exact numbers, or open "Show as table".
Lyx counts messages but never stores what they say. Counting started with the October 2026 update, so earlier days are empty, and retention needs a week (or a month) of joins before it shows a number.
In Discord
/serverstats view shows the same headline numbers for 7, 30 or 90 days. /serverstats weekly enabled:true channel:#stats posts a report every Monday (UTC) covering the week before.