I actually can replicate the same failure, but it’s not specific to DiscourseConnect being in the flow.
My passkey login worked on meta.discourse.org but failed on our internal site.
What errors do you see in your tracebacks (/logs)?
I see:
NoMethodError (undefined method `ok' for false)
app/controllers/session_controller.rb:809:in `login'
app/controllers/session_controller.rb:399:in `passkey_login'
app/controllers/application_controller.rb:424:in `block in with_resolved_locale'
app/controllers/application_controller.rb:424:in `with_resolved_locale'
lib/middleware/omniauth_bypass_middleware.rb:64:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:393:in `call'
lib/middleware/csp_script_nonce_injector.rb:12:in `call'
config/initializers/008-rack-cors.rb:26:in `call'
lib/freedom_patches/rails_rack_logger_from_rails_7_2.rb:35:in `call_app'
lib/freedom_patches/rails_rack_logger_from_rails_7_2.rb:22:in `call'
config/initializers/100-quiet_logger.rb:20:in `call'
config/initializers/100-silence_logger.rb:29:in `call'
lib/middleware/enforce_hostname.rb:24:in `call'
lib/middleware/processing_request.rb:12:in `call'
lib/middleware/request_tracker.rb:360:in `call'
@dev-managers passkey login is partially broken