We moved to NZ temporarily with 8 and 5 year ollds and they had to make new friends, be away from family and only see people from back home via video calls. Luckily the school and community are nice and welcoming so they rolled with it really well.

The visa application was long and expensive (application fees, specific medicals for immigration, etc.) so that part can get immensely frustrating.

What really helped is having similar aged neighbors for the kids to play with where we can hang out with a few beers as well.