xAPI and the LMS only

I am experimenting with the newest xAPI features and note that we should be able to send statements to an LMS and not need an LRS unless I misunderstand. I have been able to do this in SCORM Cloud but not an actual LMS.

I have tried this in TalentLMS but it is not connecting. I have written to TalentLMS for help.

Has anyone successfully sent statements to just an LMS and which system was it?