I don't think it's accurate to say Biden is banning it. The vote in the House was very bipartisan. R's were like 92% in favor and D's more like 75%.
Yes: 155 D + 197 R
No: 50 D + 15 R
On Monday the White House clarified its position: "We do not want to ban apps like TikTok. What we want – and what the
legislation we support would do – is ensure that TikTok becomes owned by an
American company so that our and our children's sensitive personal data stays
here instead of going to China and so that Americans' understandings and
views can't be manipulated by algorithms potentially controlled by the PRC."