As of Creative Cloud Desktop App Version 188.8.131.528, plugin and extension installation is not supported for users of ARM processors, (with the exception of the Adobe XD Plugin Manager). We regret this inconvenience and expect a fix in the next version of the Creative Cloud Desktop App due at the end of February 2021. Unfortunately, at the time of this writing, alternate installation methods like ExManCmd and third party tools like Anastasiy’s Extension Manager cannot install plugins on ARM devices. It is not possible to roll back the Creative Cloud Desktop App. We will update you as soon as a workaround is available.
For more information on ARM support for plugins, please see this article on the Adobe Tech Blog.