RHCSA and RHCE are three years.
The RHCE renews the RHCSA -- so if you have an RHCSA that is to expire in 2022 and you then take (and pass) the RHCE, the RHCSA and RHCE will expire in 2025.
Other exams renew previous exams. I'm not sure which update which.
How does this work if you're working towards RHCA? I'm currently RHCE with RHCSA and looking at starting the individual courses/exams for RHCA. Does each passed exam extend the RHCE and RHCSA?
I understand that you need 5 additional credentials beyond your RHCE to become RHCA.
As long as all these credentials are current(3 years from the certification Date), you will have the RHCA title. If any of the credentials become non-current, then you need to retake that expired exam or any other expertise exams