Joo Dee, One of Many

• WOTC Official Reminder Textofficial rules
  Surveil — Look at the top N cards of your library. Put any number of them into your graveyard and the rest on top of your library in any order.

• WWizards of the Coast2025-10-02
  Official Ruling
  If you control no creatures other than Joo Dee and no artifacts as the ability resolves, you'll need to sacrifice either Joo Dee or the token copy.
• WWizards of the Coast2025-10-02
  Official Ruling
  The sacrifice part of Joo Dee's ability happens as part of the resolution of the ability. Players cannot do anything between creating the copy and sacrificing an artifact or creature.
• WWizards of the Coast2025-10-02
  Official Ruling
  The token copies exactly what was printed on the original creature and nothing else (unless that creature is copying something else or is a token; see below). It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on.

Rulings via Scryfall