I’ve noticed when you go to bed with the intention and will to wake up for Fajr, you will most definitely end up waking up just in time for ṣalāh and somehow find the energy to get up and pray. This is from Allāh. When you make an intention, Allāh will create the means.If you struggle to wake up for Fajr, Tahajjud etc, just make duʿāʾ with conviction before getting into bed saying “Oh Allāh make it easy for me to wake up for Fajr” and WALLAHI you will end up waking up. &when you do, it’s up to you to roll out of bed or continue to sleep.how Merciful is the Rabb who rewards us on our intentions alone, and then facilitates avenues for us to achieve what we intended. We only have to take the first step in staying resilient in our motives, and Allāh takes care of the rest