The difference is that evangelical churches do not accept or tolerate Christians who live opposite to their faith the way that the Catholic Church accepts people like Biden, Pelosi and others.
While i wish they would be openly excommunicated (they are considered to have excommunicated themselves), one must remember that Jesus came for all - sinners and saints and that this would be in the community HE founded.
Shunning out the sinners, even the egregious ones, leaves no room for them to repent - and as long as there is life, there is a chance they might repent.