Another information regarding my current environment:
From engine database it results that my OVN provider name is "OVN"

engine=# select id,name from providers;
                  id                  |          name          
--------------------------------------+------------------------
 ceab03af-7220-4d42-8f5c-9b557f5d29af | ovirt-image-repository
 84546a85-2958-4c1d-bbfe-afeb486ebda9 | OVN
(2 rows)

engine=# 

why it seems that in its default config it would name it "ovirt-provider-ovn"?
Does this mean that it will be no conflict in name? But what about the current nortbridge and southbridge configs?

Currently my central server is the engine (that is external to the infra) and it shows this:

[root@ovmgr1 ~]# ovn-sbctl show
Chassis "1dce5b7c-a9fc-4ddb-99b4-e2c9e0fa54c5"
    hostname: "ov200.mydomain"
    Encap geneve
        ip: "10.4.192.32"
        options: {csum="true"}
Chassis "b8872ab5-4606-4a79-b77d-9d956a18d349"
    hostname: "ov301.mydomain"
    Encap geneve
        ip: "10.4.192.34"
        options: {csum="true"}
Chassis "ddecf0da-4708-4f93-958b-6af365a5eeca"
    hostname: "ov300.mydomain"
    Encap geneve
        ip: "10.4.192.33"
        options: {csum="true"}
[root@ovmgr1 ~]# 

and

[root@ovmgr1 ~]# ovn-nbctl show
    switch 32367d8a-460f-4447-b35a-abe9ea5187e0 (ovn192)
        port affc5570-3e5a-439c-9fdf-d75d6810e3a3
            addresses: ["00:1a:4a:17:01:73 dynamic"]
        port f639d541-2118-4c24-b478-b7a586eb170c
            addresses: ["00:1a:4a:17:01:75 dynamic"]
    switch 6110649a-db2b-4de7-8fbc-601095cfe510 (ovn192)
    switch 64c4c17f-cd67-4e29-939e-2b952495159f (ovn172)
        port 32c348d9-12e9-4bcf-a43f-69338c887cfc
            addresses: ["00:1a:4a:17:01:72 dynamic"]
        port 3c77c2ea-de00-43f9-a5c5-9b3ffea5ec69
            addresses: ["00:1a:4a:17:01:74 dynamic"]
    switch 04501f6b-3977-4ba1-9ead-7096768d796d (ovn172)
        port 0a2a47bc-ea0d-4f1d-8f49-ec903e519983
            addresses: ["00:1a:4a:17:01:65 dynamic"]
        port 8fc7bed4-7663-4903-922b-05e490c6a5a1
            addresses: ["00:1a:4a:17:01:64 dynamic"]
        port f2b64f89-b719-484c-ac02-2a1ac8eaacdb
            addresses: ["00:1a:4a:17:01:59 dynamic"]
        port f7389c88-1ea1-47c2-92fd-6beffb2e2190
            addresses: ["00:1a:4a:17:01:58 dynamic"]
[root@ovmgr1 ~]# 


and on my hosts currently I have something like this (eg on ov200):

[root@ov200 ~]# ovs-vsctl show
ae0a1256-7250-46a2-a1b6-8f0ae6105c20
    Bridge br-int
        fail_mode: secure
        Port br-int
            Interface br-int
                type: internal
        Port "ovn-ddecf0-0"
            Interface "ovn-ddecf0-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.33"}
        Port "ovn-b8872a-0"
            Interface "ovn-b8872a-0"
                type: geneve
                options: {csum="true", key=flow, remote_ip="10.4.192.34"}
    ovs_version: "2.7.3"
[root@ov200 ~]#