This question is as much about organizing training as it is about content. The goal is to connect skill needs, available training, learners and real progress tracking.
Start from skill needs
A useful portfolio begins with the skills to develop: tools, methods, professions or expected transformations.
Group available training
Purchased courses and paths form a pool that the organization can mobilize.
Allocate according to priorities
Training can be assigned progressively according to roles, teams and development priorities.
Use skills paths
A skills path helps combine several existing training courses when an objective requires complementary building blocks.
Track portfolio use
The portfolio becomes most useful when connected to learner assignments and progress.