To connect Logic Remote to Logic Pro or GarageBand on your Mac, check network settings on your devices or remove previously connected control surfaces from Logic Pro.
support.apple.com
Before you check firewall and control surface settings, make sure your device running Logic Remote is on the same Wi-Fi network as your Mac:
If you still can't connect, check to see if you have a TouchOSC device added in Logic Pro, then remove it if you do. Remove TouchOSC device from Logic Pro
Logic Remote might not connect if you previously added a TouchOSC device as a control surface for Logic Pro.
Close Logic Remote.
Open Logic Pro X on your Mac.
Choose Logic Pro X > Control Surfaces > Setup.
Check to see if a TouchOSC device appears in the window. If so, select the device, press the Delete key, then click OK.
If there are other Logic Remotes in the window, delete them.