> How can you create a community if you are hopping countries every 4-6 years?

Stop hopping before you get old and infirm. Become part of the local support network helping those older and less fortunate than yourself. In turn, you get helped by those around you.

Learn Argentine Tango. If you live in a big enough city, most likely there will be a tango community. Classes 2 times a week, one practica and one milonga and puff most of your week is covered.

I don't think you do. How can you possibly build strong relationships if you're here today, gone tomorrow?

Have a co-expat hop countries with you.

Religion. I’m as atheist as you can get but I still go to Catholic Church on weekends just to form community. Religious people are also generally good upstanding people (if you ignore their bigotry against LGBTQ people)