I think Biden's most recent public appearance was yesterday at lunchtime when he delivered about 10 minutes of remarks at the Friends of Ireland luncheon alongside Speaker Johnson.
https://www.youtube.com/live/4ZXYuMs-GwI?si=JrJGlaEcKInUOZoG&t=3094as you might expect, his speech was perfectly good, which is why instead of mocking him for the senility and dementia we've all been told to expect whenever Biden appears in public, the neanderthals at the RNC skipped it and instead put out an absolutely retarded tweet where they attacked him for walking down the stairs too slowly after the speech (he's walking totally normally and at the same pace as Speaker Johnson next to him) and then misidentified the Prime Minister of Ireland as "Biden's handler":
https://twitter.com/RNCResearch/status/1768708716235313526