As many of us aware that Software development to moving towards API development for the services using Swagger.
Open API Specification 3.0 was out quite some time ago and even service packs ava...
download your OpenAPI 3.0 definition JSON file.
use https://editor.swagger.io/ and convert JSON definition as yaml file.
then import into SOAPUI version 5.7.0.
then should be able to see all the list of APIs as WADL.
finally generate test suite and continue the testcases in SOAPUI