I don't think any UK loco manufacturer has released a decoder without 126 speed steps, even though some have had pretty rotten decoders.
The Roco crane is I think the only RTR decoder fitted item that came with a 14-step decoder, and that was decades ago. The 28-step spec and 126-step spec came at about the same time, so there are very few, if any 28-step decoders that don't also support 126-steps.