Setting up phone for using abroad (Huawei p30)

I have tried to follow the instructions for setting up my phone (huawei p30) to use abroad but they are not compatible with my phone. There is nothing under settings called 'wireless & networks' or 'connections'. I have found 'Access Point Names' under 'Mobile data' but when I open it only 'SMARTY' is listed, not '3' like the instructions suggest. There is also no option to edit the access point, only to add a new APN. However, when I look at the Smarty APN, the APN is already set to 'mob.asm.net'. The MMS proxy is set as 'mms.three.co.uk', the MMS port is 8799, and the MMSC is http://mms.um.three.co.uk:10021/mmsc, only the name is 'SMARTY' not '3'. Will this work abroad? Or do I need to create a new APN under the 3 name?