Hi, shehbaz!
You can use local-preference of bgp path attribute between ibgp peer and ibgp peer.
The example is as per below:
1. Define the ACL to permit routing that you want to pass to the ibgp peer.
#
acl number 2004
description default-internet
rule 1 permit source 0.0.0.0 0
#
2. Define Route-policy.
#
route-policy test deny node 10
if-match acl 2004
apply local-preference 200
3. Please use route-policy to ibgp peer.
#
ipv4-family
unicast
peer
10.10.64.2 as-number 100 route-policy test
#
This is the viewpiont of the configuration. Happy for your acceptance!