If I am reading this correctly the VBR server is not managing the agent so you will not see this in the last 24 hours. You need the agent managed by the VBR server for it to show here.

 This is in my pc.

This is on the pc I attempt to back up to

So that shows the backups in the second screenshot so I am confused as to what is not showing?  Is there another tab that doesn't show anything?

i change ip of Veeam Backup and Replication Coomunity edition

but client search old ip

So the client is pointing to the VBR server repo?  Still unsure how to help here as the issue is still not clear to me.  The client meaning the agent?

Did you change the IP in the agent job definition, too?

last config

• my pc with Veeam Backup  console 192.168.0.13  mypc.domain.local
• Client with agent :  nbluca.domain.local

all work correctly

now i change my ip

• my pc with Veeam Backup  console 192.168.0.150  mypc.domain.local
• Client with agent :  nbluca.domain.local

Now i only see job of rescan anche send configuration.

Ok, and the DNS name of the VBR server is correctly resolved to the new IP on the agent computer?

The IP change should be no problem if the DNS resolution is working correctly.

If you don't have DNS then change your hosts file to point to the new IP for your VBR server.