Hello Folks !
The Red Hat exam duration varies depending on the exam you take. You can check the respective exam duration by going to the respective exam links eg for EX294 ( RHCE ) : go to the link https://www.redhat.com/en/services/training/ex294-red-hat-certified-engineer-rhce-exam-red-hat-enter... and then click on "Get Started" as shown below :
then you will land onto the LMS page and you can see the exam duration here :
You can repeat the process for all the other exams like EX280 , EX210 , EX358 etc.
Hope this helps !
Let me know for any queries or if a help is required.