Just look at the state of the USA with 28% immigrant population.
Which STILL has the 6th highest GDP per capita (10th if you count tax-haven microstates and overseas territories).
Centuries of mass immigration built the US economy. Y’all are acting like economics is all zero-sum and more people = everyone is poorer, but the amount of jobs doesn’t stay constant as the amount of people increases. The US always had an influx of immigrants to fuel the ever-growing economic machine.
There’s plenty of reasons why a lot of people in the US can’t afford to live in cities, etc. None of it is because of immigration, it’s mostly corporate greed and stupid zoning laws.