Grafana data source from other Grafana

Hi,

I am working a one project that working with multiple SaaS systems.
Each SaaS systems providing Grafana dashboard.

So I want to consolidate all SaaS system’s Grafana dashboards into a one Grafana dashboard.
Do I have some reasonable way to use other Grafana as data source?

My Grafana —> Other vendor’s Grafana (I can access) → Other vendor’s internal systems (I cannot access it)