MX routers are not properly exporting NAT pool prefixes, hence not load balancing the traffic.

These MXs are load balancing traffic to a single QFX using IBGP

Multipath is configured in both MXs and export policy applied to the forwarding table is also configured.

BGP sessions are properly established.

Routes not shared as expected from the MX routers to the QFX via IBGP

IBGP session is properly stablished

It was determined the missing route was not included on the prefix-list to be exported, other devices with the same configuration worked fine because that route was local and was beeing advertised via another term