You spend some money delivering learning and development stuff.
Is it a cost or an investment?
If there is no learning transfer, and the learner does nothing differently, then it’s a cost.
If there is learning transfer and the learner does some different stuff that is useful, it’s an investment.
The Learner chooses.
How can you help your learners choose to do learning transfer?
What do they need from you?
You might start by asking them!
Be clear about what you want them to do, and they will know what they need to do it, and what’s stopping them from doing it.
Your learners already know how to turn your cost into an investment.