Check if the process in in RUNNING state or RUNNABLE state in Linux

Question

The state of any process can be found out by using multiple tools including reading from /proc/[pid]/status where

$ cat /proc/8976/status
Name:   redis-server
State:  R (Running)
Tgid:   8976
Pid:    8976
PPid:   8964
...

The R here typically denotes that the process is either in running or runnable state. Can we somehow check using the existing /proc or sysfs or existing kernel tooling if the process is waiting to be scheduled upon the CPU in a runqueue or if the process is indeed running on the CPU?

I do understand that since Linux is preemptive, it can preempt after a time slice and maintain fairness amongst the processes which should not result in high runqueue latencies.