Localization for two different regions / domains with the same language

I have a Wordpress site that is based in the USA (e.g. www.example.com). We were instructed to create a version of the UK / GB site that has its own domain (for example, www.example.co.uk), but has common common pages / posts / backend. About 75% of the pages are the same for both versions, but there will be several sections (for example, "About Us" and "Contacts") where they differ from the account for regional differences.

Example

The site in the USA (www.example.com) has 4 pages:

• home
• ABOUT
• Services
• Contact

The UK website (www.example.co.uk) also has 3 pages (2 different, 1 identical)

• Home (Same as USA, but URL should be www.example.co.uk)
• ( , URL- www.example.co.uk/about)
• ( , , URL- www.example.co.uk/services)
• ( , URL- www.example.co.uk/contact)

UK/GB , , ?