In the first 20 minute cold pitch:
- Set up your platform business situation
- Pitch 1 (maybe 2) markets properly (the most promising ones)
- Hint at further upside in the other markets (1 quick slide)
If that went well, elaborate more in follow-on meetings about the other opportunities and provide a discussion framework about possible prioritisation, and you can even ask the potential investor for advice.
Do not try to spring all 10 stories in the first 20 minutes, you will fail.