It's not the Biden border problem, it's the Donald Trump National Emergency which he declared in February of 2019, and which has never ended.
Trump dismantled the immigrant courts, and the government services for new arrivals, as well as the visa and immigration infrastructure in and around the Southern Border, so there are no longer any immigration facilities available to newcomers, except his for profit concentration camps, which Biden has now closed.
You have 11 million job openings, and just over 6 million jobs. The US Chamber of Commerce is screaming for work visa to be opened up so they can import some people to do these jobs. It currently takes 2 years to get a work visa for the USA.
Americans are complaining about the high cost of food well that's because no migrants have been allowed in to plant, pick or process the crops. Did you think you could keep the migrant workers out of the country and it wouldn't impact your prices?????
And Republicans refuse to discuss reforming the system, all while blaming Democrats for the problems THEY created so their rich donors could have cheap labour.