H4-Dependent - continue Education on H4 or switch to F1?

Hello Community,
I have my I-140 approved and next year my Kid will complete High school too. Its time for planning/enrolling into college.

I’m checking for options:
Option 1. Is it better to continue college education on H4 until 24 years?
Option 2. Switch to F1?

Wondering if my Kid switch to F1 - will be covered under my approved I-140 or kid will be on his own F1 status ?