Hi @robert.white,
Welcome to the Auth0 Community!
If you want to find logs for the Auth Challenge from Bot Detection, you could look for
the pla log event type code, which is generated before login and contains pre-login risk assessment data. Then look for the requiresVerification: true to determine if Captcha/Challenge was enforced.
You could also verify this by checking for successful login events (type: s) and looking for the requiredCaptcha: true to determine if Captcha was enforced for logins.
From here, you could count the number of times bot detection was triggered since each log event indicates that bot detection was triggered.
(Reference: How to Monitor Bot Protection Usage)
Thanks,
Rueben