My breaker is 100A and matches the panel by Eaton. The panel has a second 20A single pole breaker for a 120V 20A convenience GFCI outlet. The subpanel is fed from my main electrical panel with oversized wiring and a 125A 240V breaker. Final connection to the Lucid EVSE is made with copper sized to match Lucid's recommendations.
Presumably you can replace one of the 40A breakers with a 100A breaker to the Lucid EVSE. However, it will draw 80A leaving only 20A capacity for equipment on other breakers in the panel when the Lucid is charging. That's probably an issue for your 30A AC unit if it draws 24A while the Lucid draws 80A. 104A total will trip your breaker at the panel feeding this one. Consult and electrician, but they'll likely recommend setting the Lucid EVSE to charge at 72A (90A breaker) or 64A (80A breaker) to be sure not to overload the panel.
Based on my limited experience with the Lucid EVSE it reported drawing a max 18kW, which is 75A@240V. It could easily draw the rated 80A when the car's SOC is lower. It's also possible that the reported delivery at the vehicle is not accounting for the onboard cooling and any other overhead in the car or supply equipment, and it actually used the full 80A with 75A going into the battery. I don't know whether the reported 18kW is the amount "drawn by EVSE", "delivered by EVSE", "delivered to Wunderbox", or "delivered to car battery." Since the app reports equialent miles added per hour of charge, I suspect that the 18kW doesn't include power used delivering that to the battery.