As wcf was not ported to .net core, you will need to do code changes. Microsoft suggests switching gRPC instead.
Microsoft did create a new svcutil which will generate code proxy for an existing wcf service.
Note: I switched all my wcf to rest api and have never used the new tool. You will probable need to generate new proxies.
If you need to port a wcf service, instead of client, then Microsoft has no solution. There is an open source project (do not know how complete)
https://github.com/CoreWCF/CoreWCF