Models without TTTELocomotive scripting, such as rolling stock and those that only use the AJS superscript, are compatible with Trainz a New Era and above, and so you'll find them under the 'TANE Content' section. As such, you'll find these models under the 'TRS 2019+ Content' section. This scripting is compatible with Trainz 2019 and Trainz 2022, including Trainz 2019 SP5.
Most of these models use the TTTELocomotive scripting (by Rileyzzz), which allows for the eyes to be 'puppeted' with a video game controller, as well as moved with on-screen controls. Here you'll find the models that were made for the Youtube series Sodor the Modern Years, which have been released 'as-is' in case anyone else wants to use them.