Hi Folks,
Recently, while working in Sales Process I was struggling to find the option to Create Order on Quote entity in Unified Client Interface. After spend of hours of time I got to know about the setting that we need to enable in order to view that option in UCI client.
By enabling the following setting, you'll be able to find this option.
Go to Settings > Administration > System Settings > Use legacy form rendering select "No"
Hope it helps someone. Cheers