Where can I find the list of supported use cases?

It depends what you mean by use cases...

we may distinguish 2 main categories

use cases created for a release
use cases integrated in CI

Release use cases

The use cases associated with a release must be described in the official documentation.

See the list of these use cases from the previous versions:

Version	Link

Version	Link
Casablanca	https://docs.onap.org/en/casablanca/submodules/integration.git/docs/docs_usecases.html
Dublin	https://docs.onap.org/en/dublin/submodules/integration.git/docs/docs_usecases.html
El Alto	https://docs.onap.org/en/elalto/submodules/integration.git/docs/docs_usecases.html
Frankfurt	https://docs.onap.org/projects/onap-integration/en/frankfurt/docs_usecases.html

Please note that, if not automated, these use cases may be closely linked to a given release and not maintained over time.

Integration can maintain only the automated use cases not dealing with proprietary VNFs/tooling.

You may find lots of material in the wiki...but the wiki is not an official source, so it can be misleading and not up to date.

Automated use cases

These use cases are integrated by the Integration team in the different CI/CD chains.

If they have been automated, they must have been declared in the official test DB: http://testresults.opnfv.org/onap/api/v1/projects

Integration team maintain the integration and security tests.

You can list these tests thanks to the API

project	link	tests

project	link	tests
integration	http://testresults.opnfv.org/onap/api/v1/projects/integration/cases	core small medium full healthdist postinstall basic_vm freeradius_nbi clearwater_ims pnf-registrate onap-k8s onap-helm hv-ves 5gbulkpm nodeport_check_certs basic_network basic_cnf ves-collector cmpv2
security	http://testresults.opnfv.org/onap/api/v1/projects/security/cases	root_pods unlimitted_pods cis_kubernetes http_public_endpoints nodeport_ingress jdpw_ports kube_hunter nonssl_endpoints versions

The code of these tests may be distributed everywhere....

in upstream repositories, in internal ONAP repositories, they can be written in different languages, using different frameworks...but, as we are using xtesting framework to unify the way to launch them. You can get all the information thanks to the Dockerfile of the xtesting dockers (https://gerrit.onap.org/r/admin/repos/integration/xtesting).