Hinge joints anchor is not visible in editor, but in official unity tutotial about joints its visible.

Go to the Gizmos button and then enable the Gizmo for the specific Joint you are using. To make sure the gizmo is enabled you can just enable all gizmos, now you're safe.

Right click on the joint component of your gameobject in the inspector and choose the lowest selection "Find References in Scene", now you should see the Anchor gizmos. you can not modify the anchor position per drag and push with the cursor, but you can modify the values in the component inspector and you should see the anchor moving, it's a good compromise i think.

I dont't know why the "normal way" is not working like in the older Unity versions. I think it's a bug in the newer Unity, because such things occur not only with joints but also with reflection probes for example.

When you press the the 'edit angular limits' button in the joint component (gizmos needs to be on in scene view), the center of the 3 displayed axes is the position of the anchor.

Visit to the Gizmos button and then enable the Gizmo for the specific Joint you are using. To make sure the gizmo is enabled you can just enable all gizmos, now you're safe.

You need to check the "Use Limits" box