Latest 2.88.1 (updated 11/15) documentation site under API reference, it does not list all service clients for navigation and search.
oci sdk 2.88.0 lists dozens of service clients.
oci sdk 2.88.1 only lists three service clients.
Need to provide same access as previous version
The issue has been fixed now - https://docs.oracle.com/en-us/iaas/tools/python/2.88.1/api/landing.html
Reference to GitHub issue - https://github.com/oracle/oci-python-sdk/issues/495
Thanks for reporting it.