Hi, on this Teradata page https://www.teradata.com/Products/Cloud/VMware
it is stated
At present (July 2019), there is no "trial" version that includes MLE functionality. The current versions of Vantage Developer on AWS Marketkplace and TD Express for VMware player include in-database flavors of some analytic functions (e.g. nPath, Sessionization, Attribution, and Scoring) but as you discovered the VMware Development Tier image is still an earlier version that lacks most of those.
Thanks, I was almost ready to embark on the (somehow) costly version of Teradata Vantage on AWS (around 500 $ / month) but since it offers the same (limited) MLE functionality like the Express versions I will stick with those.