It’s not lying under any conventional definition of lying though. Saying something is a lie usually indicates deceptive intent, along with a knowledge–or a reasonable belief–that something you’re saying isn’t accurate. If I believe that the earth is flat, and I say so, am I lying? Or am I just wrong?
Biden said that he would cancel student loans; he’s done everything in his legal authority, and a few things that weren’t, to try an cancel them out. Do you think that the fact that SCOTUS prevented him from doing so makes it a lie? Or was he unable to follow through due to factors that he couldn’t directly control?
Uh, yeah, it literally was. Unless you’re saying that you want the president to be able to do whatever they want, even when a majority of congress and courts say no.
This might give you some better idea of what happened.