Very interesting discussions, i ended up reading all 17 pages!
I am in a similar "ping pong" mindset.
Did 2.5 years in UK starting in 2018, had a child there with my english partner but moved back to Melbourne in 2021.
Had our second and after a year went to visit partners family in UK.
Now that I have come back, I keep thinking about if we made the right move. My partner is not 100% happy but is trying to get on with it, I have family here and am close but I can see myself maybe being in the UK.
I grew up in Aus but always felt a loneliness/isolation that I actually didnt feel when I was in London.
The only thing is I know we wouldnt move back to London (partners family is in Yorkshire but we are not wedded to Yorkshire). So I just dont know what life outside London could be like.