How to check Channel Integration Framework Version

1. From your Power Platform Admin Center, select environments as shown in the figure below:

2. Now click on the environment for which you are using Channel Integration Framework as shown in the figure below:

3. Now click on Dynamics 365 Apps from the right as shown in the figure below:

4. Now click on ellipsis for Channel Integration Framework and click on details as shown in the figure below:

5. You will get your Channel Integration Framework's version as shown in the figure below: