The Tenant admin can manage captcha settings.
If the Tenant admin has enabled Recaptcha, it will appear in the front end while signing up as a new user. We can generate the site key and server key by following this configuration document.
https://docs.google.com/document/d/1Z3tb1Go_RGhdYjAt_5I75AoPKGMmwUOdr70J_sRmiL0/edit
The selected captcha settings are made available to users during registrations.