Biden pressured the House and Senate to draft a comprehensive bipartisan immigration bill, and they did. He said he would sign it even though there are parts of it he didn;t like.
The Bill has not been allowed to be presented to he House for a vote, because it would pass.
It has not been put to a vote because of Trump, who threatened Republicans that he would screw them if they allowed it to be put to a vote.
Biden did all that he could do with the Congress that he has.