If you are a company with multiple brands that offer the same app product, can they all have similar UI? so the colours and font styles may differ but the layout and content are the same. for example, if you are a restaurant company and you own multiple different brands of pizza restaurants, and they all offer the same app for pizza delivery, can they all just have same UI? The section on copycats is not clear on this https://developer.apple.com/app-store/review/guidelines/#copycats
Does the Apple App Store Review Guildelines permit one company to produce multiples apps with similar UI
That will probably not be allowed.
But you may have a simple solution:
- common app
- configuration file which may be selected or configured in the app (color choice for instance)
- or configuration file downloaded from your server