See I agree this is where the Reform lot get quite muddled.
So the argument is that Labour want more immigration... why?
It's the right wing that has been invested over the years in importing cheap workers (or, at other times, outsourcing our goods and services and buying them back in for a discount). It was a conservative programme that brought in swathes of uneducated labourers in the 70s and 80s to fill our factories because those workers wouldn't unionize. That's the legacy we still see in places like Birmingham today. I'm not blaming the people - they were offered jobs and took them. But it absolutely was not a socialist programme, it was a capitalist one aimed at breaking the unions.
And if you ask the reform lot where they'd want to live, half of them love places like Dubai - where there is one of the highest immigration rates in the world! It makes. no. sense.
The only arguments that left wing governments ideologically want more immigration ends up descending into great replacement theory nonsense which no one other than the tin hat brigade wants.