Almost all McAfee product is trust base, so if you have check in all extension, you can see it
you can also check if the extension is run normal in extension page
assume you are using admin account, it is no normal if you can not see FRP in policy
If you do not want to reinstall the extension, it is better to open case
Now I found the reason.
As you said because the agent version and FRP version does not match.
Agent version should be 5.7.4, and FRP version should be 5.3.0, then when I install FRP it works.