Azure Load Balancer IP Forwarding

Question

We have a requirement to use Private Link Service to accept connections from our partners.

In current network, we have NVAs fronted by Azure Load Balancer. All the traffic across networks should go via the NVAs by configured UDRs with the Azure Load Balancer as the next hop.

When creating the private link service, a standard load balancer is needed, where Azure only allow VMs in the backend endpoints instead of IP addresses. As we need to direct all the inbound traffic to the NVAs from our patners but we don't want to use the existing Azure Load Balancer of NVAs for private link service as we want to have more flexibility of entry points/IP addresses for different partners. Is there anyway we can do an IP forwarding on the load balancer for private link service, to achieve this flow path, "Private Link Service--->Standard Load Balancer----->Existing Load Balancer------>NVAs"? A reminder that the standard load balancer linked to Private Link Service is not allowed to use IP address as backend.

Thank you in advance