I’ve discover a bug with the range of date : I can’t choose the montly or weekly range of date in Firewall event. I’v test with Firefox, Chrome and Edge. You can see my gif :
The Cloudflare API List Events endpoint [1] seems to return all firewall events with no time constraint, even on a Free plan.
It is considered deprecated according to the docs, replaced with a graphql dataset [2]. The graphql firewall events can only be queried for the last 15 days on a Free plan, however.