Here is the document which describes the changes in OCP 4.9 https://docs.google.com/document/d/1swHsFXJJDSV1PqAZexhJ4-Xk6t3QA4INC4RZmi3WN3g/edit#heading=h.cqllfaead2tr
We already use the CSI sidecars from OCP 4.9 in ODF 4.9.
Based on last comment I am marking as verified.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: Red Hat OpenShift Data Foundation 4.9.0 enhancement, security, and bug fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2021:5086