Accessing ESR content of two PI servers in one ECC system.

Dear Experts,

I am connecting 2 PI systems to one ECC system and proxy would be used at ECC side to send data to many interfaces .

SO I understand that using sxmb_adm->Sender/Receiver id we can send data to 2 PI systems.But would it be possible to access ESR content of PI systems in ECC at the same time? using single SAP_PROXY_ESR ?

I saw the below discussion:

ECC - sproxy- ESR with PI and PO systems

but just wanted to confirm ,during discussion once, got to know that there is standard way to do it , not a workaround.

Thanks in advance.