Ahsan Allahu ilaykum, if I can stand while praying at my seat on a plane but cannot bend enough to place my hands on my knees and flatten my back to perform rukūʿ, should I perform rukūʿ by bending slightly with my hands on my thighs or just sit down to perform rukūʿ?

Ustadh AbdulAziz al-Haqqan

Bend as much as you are able while standing, Allah Jalla wa ʿAlā (the Majestic and Exalted) says, the meaning of which is: "So fear Allah as much as you are able" (Surat al-Taghabun, ayah 16)