Congrats on the new car! Yes, we do have a roof rack set up that will work with your 2024 Lexus ES 300h even though you don't have the side rails. This mounts directly to your roof with custom fit clips and the crossbars will not overhang the side. I recommend the roof rack by Yakima and it includes the following parts:
Yakima BaseLine FX Roof Rack for Naked Roofs - Aero Crossbars - Aluminum - Black - Qty 2 item # Y89UV
BaseClip Fit Kit for Yakima BaseLine Roof Rack Towers - Qty 2 item... view full answer...