Create single Patient record across Partitions in FHIR server

Hi, we have setup multitenant using partition in FHIR but major requirement is to create single Patient record across all partitions.
How can we achieve it

We are using URL based tenancy approach.

Define another URL that behaves as a ‘front end’ for all of the tenants and when you see that, ignore the tenant. This will behave in the same way as a front end that queries multiple back-end systems behind the scenes and maps their URLs to its own.

Is it fine to have patient created at in DEFAULT partition always and rest of the resources in respective partition… Do you see any concern with this

Do all of the clients see the same patient information? Do all of them have the ability to update it?