Hi,
Please follow below procedure
Create any pool(eg-abc_80) with node 1 --(10.1.1.1) and node 2 (10.1.1.2)
then create VIP with port 80 service
for example VIP is multiple_sites_80 with IP address 192.168.1.10
select port 80 as services and apply pool into the VIP config .
Then contact to DNS team and ask them to create entry for VIP 192.168.1.10 and map below FQDN with it
newapp.dev.xyz.com newReportcenter.dev.xyz.com newsharepoint.dev.xyz.com mysite-sharepoint.dev.xyz.com
If you want to access it from outside world then entry should be external otherwise internal or may be both as per your requirement .