Through a Google Docs form, it is registering all the requests of the users, which must leave a note of the email with which they log in to Xbox and the username in Discord to be able to take a look at the forum where they are sharing impressions by all interested parties and where all the details of the installation are reported.
In order to download RetroArch directly in our console without having to activate the developer mode, we will simply have to ask the developer who distributes it for permission, and in that case, it seems that someone has been quick and is offering just this. How to download RetroArch on the Xbox Series X