Configuration migration from virtual F5 to phisycal F5

I would just load the UCS and ensure the new physical F5 is disconnected from the network before you press enter. Note that you'll need to load it with the 'no-license' option so as not to overwrite the physical F5's license file.

tmsh load sys ucs xxxx no-license

If it fails to load, it will have at least installed the config files, so you can carefully edit bigip_base.conf or bigip.conf as appropriate, and fix any errors until it does load (tmsh load sys config)

Once loaded, use 'config' to set a new management IP address, then plug in the management interface, and use that to make any changes that are needed, using tmsh or the GUI.