Trigger Azure Pipeline on completion of another trigger Pipeline on same branch using YAML

Trigger Azure Pipeline on completion of another trigger Pipeline on same branch using YAML

Suppose there are two repositories A & B, A & B have A_CI  B_CI pipelines accordingly.

A & B both have multiple branches:
1. Main

2. Dev

3. QA

4. Prod

I want if A_CI get triggers on QA branch and after completion B_CI should also run on QA branch only.