A heads up that our next QA cycle will be starting soon on 24 October 2021, 4 weeks prior to the scheduled release of Moodle 4.1.
For details of the process, please see the QA testing guide.
In the meantime, you are welcome to try out new features on the Moodle QA testing site then post in this forum about any issues you come across. Please report any obvious bugs in the Moodle tracker.