I can’t imagine your set up at all in terms of how it would feel.
I’m an army brat with parents from a pretty multicultural city so it’s completely normal to us to have friends and even family (married in) from a wide variety of nationalities and cultures.
Parents have over the years especially when dad was in the army had/have (they’ve loved being able to reconnect on Facebook with people they knew who’ve now returned to their home countries after retiring) friends from Nepal, Ghana, Sudan, South Africa, Morocco, Egypt, India, Hong Kong, Guyana, chile...
Even friends they have from glasgow inc 1st and 2nd generation Chinese, Indian, Bangladeshi, Ugandan, Japanese, polish, Italian (lots of Italian friends but as they’re catholic and there’s lots of Italians moved to glasgow not really unusual), Spanish, Russian...
My own friends hail from places like Sierra Leone, Ghana, Mauritius, usa, Canada, Iceland, Sweden, Norway, France, Italy, Belgium, New Zealand (and she’s Maori too), Australia, Germany, Netherlands, japan, Sudan, Ethiopia, Poland, Austria...
Some I met through the army, some were colleagues (especially nursing) some were neighbours, some I met at uni, some through other friends, some are people as I say who married into my family.
Do you really live in an area where you’re not meeting non white, non British people op or is it self selecting?
Also odd that your dd is working and living in the Middle East BUT not mixing socially outside the British community?
There can be slight differences in culture, humour etc but never so much so it’s difficult to socialise with them. We’ve far more in common than differences.
But even my friend who’s only ever lived in 2 houses in the same southern English village has friends from several different countries that she’s met through work or they’ve moved to the village.
“I think working internationally, going to uni AND living in a city is key here!”
It’s not the only way to know a wider range of people though. I find it hard to believe you have NOBODY in your nearby area in the Uk these days that isn’t at least 2nd Gen immigrant. Or that you don’t meet people through work or hobbies that are of different backgrounds?
I live now in a VERY white, working class, catholic part of Scotland and even here I have friends I’ve met at school gates, through being neighbours, through a hobby who are Polish, Ukrainian, South African, Indian, Brazilian and Argentinian.