It arrived as expected - Thomas the Tank Engine MOD in Choo-Choo Charles!
The MOD is made by Twitter user @y_nakajima_, and has been shared via YouTube and Twitter. However, this MOD is private and cannot be downloaded from anywhere.
Choo-Choo Charles is a 2022 indie horror game developed and published by Two Star Games. In this game, your goal is to upgrade your monster-hunting archivist with defenses in order to fight and defeat the titular character, Charles, an evil spider-train hybrid monster that wanders the landscaped looking for innocent people for a feast.
Source: YouTube