Adobe commerce REST APIs and Third party APIs (ERP system) integrate into single GraphQl unified API using API-Mesh

[HarishKu12]

I have successfully integrated Adobe Commerce GraphQl and Rest API into one single GraphQl unified API using API-Mesh (mesh.json), Now I am trying to integrate third-party ERP APIs using API-Mesh - (mesh.json), I have tried multiple solutions but no luck, Could you please guide me for the same.