curl --location --request GET 'http://jira.local:8080/jira/rest//rest/api/3/fieldconfigurationscheme/project?projectId='
{"maxResults":50,"startAt":0,"total":5,"isLast":true,"values":[{"projectIds":["10","11"]},{"fieldConfigurationScheme":{"id":"10002","name":"Field Configuration Scheme for software related projects","description":"We can use this one for software projects."},"projectIds":["12","13","14"]}]}
projectId=10000&projectId=10001
.