The D&RGW generally donated locomotives, cabooses, or other equipment to towns and cities that asked for them.
The D&RGW donated 268 to Gunnison, 278 to Montrose, Caboose 0588 to Lake City, 169 to Alamosa, 168 to Colorado Springs, 223 to Salt Lake City.
Not sure what the situation was with standard gauge engines, but perhaps Denver, Salt Lake City, etc. did not ask for an engine. Those cities do not have UP or any other locomotives on display. So perhaps the lack of any D&RGW standard gauge engines being preserved is because no one asked for one.
The RIo Grande went all out when it donated some of the narrow gauge engines. It laid some third rail in front of the Colorado Springs depot and had 168 fired up and placed an 1800 class 4-8-4 next to it. D&RGW officials spoke at the donations in Colorado Springs, Salt Lake City, and Alamosa.