@Veronika Bulavina , the egress/outbound IP will be used when traffic is initiated from an AKS pod to external services hosted over the Internet.
For ingress/inbound traffic from Internet, the ingress/inbound IP will be used and not the outbound IP.
More here in the link https://learn.microsoft.com/en-us/azure/aks/load-balancer-standard
Regards,
Vidya