All the credible evidence you need is in the AP link that Biden had to resort to stoop to the level of resuming construction of Trumps wall, which he initially blocked by executive order. He did this because things got way out of hand with people coming across the border, not because he just wanted to look like a huge hypocrite.
Get serious or stop. Put forth an honest explanation as to why Biden did this if it wasnt that crossings at the border hadnt reached a dangerously critical level. Do this instead of demanding more evidence. That is evidence, and very concrete evidence that the Democratic policies were encouraging, directly or indirectly, illegal immigration and doing nothing to stop it. Address it.