All open borders advocates support broadly similar policies (reducing barriers to migration).
There are going to be large differences in people’s views about what (if any) other policies are going to be needed to avoid open borders turning into national suicide. For instance, a right-libertarian open borders advocate would say “open borders is incompatible with a generous welfare state, and closed borders is a moral abomination, therefore we must abolish the welfare state (or at least shrink payouts to a level where they are matched to incomes in the poorest country in the world)” whereas a leftist advocate would prefer to trust in migrants quickly becoming productive net taxpayers without any need for welfare restrictions.
There are going to be large differences in people’s views about what (if any) other policies are going to be needed to avoid open borders turning into national suicide. For instance, a right-libertarian open borders advocate would say “open borders is incompatible with a generous welfare state, and closed borders is a moral abomination, therefore we must abolish the welfare state (or at least shrink payouts to a level where they are matched to incomes in the poorest country in the world)” whereas a leftist advocate would prefer to trust in migrants quickly becoming productive net taxpayers without any need for welfare restrictions.