Thanks Michael
Just had a word with my dealer - 450H+ FSport + Takumi Pack, Order placed in Aug 2022, initial ETA March and now stands at June 2023. Dealer confirmed that my order is price locked so pricewise no impact for me. According to him, the above mentioned Lexus statement is valid for the new orders which are being placed now.
Although he thinks my Lexus will be per 2023 specification, I am still holding hope for some extra goodies.