Hi,
I’ve moved your topic to the support section of the forum.
In order for Roon’s @support team to better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so they can have a clear understanding of how your devices are communicating.
Can you share the IP addresses that the Roon Core and iPad are using?
If they are on different networks they will not be able to see each other.
They need to be on the same subnet e.g. 192.168.1.xxx
If the IPs are good, then another area to look at is the Windows firewall, as a test try switching it off.