Hi, @Ivan Siciliano
Thank you for posting in Microsoft Q&A forum.
We can customize the Out of Box Experience with the tool WISM, here is a guidance for SCCM, you may refer to it and apply it to MDT.
https://www.anoopcnair.com/sccm-customize-windows-out-of-box-experience-oobe-using-configmgr/
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Add comment".