If he is interested in matches living abroad, then he should take an autosomal test. Ancestry is the most popular test - he is almost guaranteed to get many matches.
I would not recommend a Y-DNA test because it is possible he may not get any useful or traceable matches which would be a bit disappointing.
I am not sure if there is a minimum age for a DNA test but this is something you should check before purchasing. Thinking about the age ranges with any of my matches I don't recall any under 18.
I disagree slightly with Liz, and don't believe that a 14 year old would suffer any more distress than anyone else if they received some "unexpected" results. I think kids are resilient. Nevertheless, it is something you might like to consider. If both you and your husband have taken tests with no surprises then you would have no worries in that department.
I think they are still undertaking DNA tests despite covid19, but once again, this is something you would have to check.
All of the companies have sales at various times through the year though if it is a birthday gift, you might not want to wait.
You could always buy him a Nintendo Switch if the DNA test is a no go.
