It's just an invitation to the interview, would be the second one, I already had a first interview with them in 2018.
On one side, I can't complain about life here, in-laws are close, we're getting ready to build the house, the city and country is safe, I can spend time with the kid and wife instead of slaving away on a job.
On the other side, the pay has way more potential than here, there are other opportunities for all 3 of us on the other side of the pond (jobs, education, travel, hobbies).
I think the biggest factor would be distance from the in-laws.