Frequent conversation:
"oh you have a smartwatch"
"no it's dumb in all the right ways, which is the point"
Notably I have notifications but can't act on them, which prevents me from picking up the phone just to check notifications and then be drawn into doing actions. YMMV.
For waking up, something not technological but working 99% of the time for me: pets (or kids) though you'd want other reasons as well to have those beyond waking you up early in the morning...
Most of my life I've had cats or dogs and their internal clock is amazingly on time. They are actually smart and try different things if you don't wake up at first, adapting to their owner. They include waking mechanisms such as sound, touch, light pain, emotional rewards and possibly guilt tripping/punishment to keep you accountable if you fail to wake up. Birds can work too but I wouldn't recommend keeping a rooster in your bedroom for an alarm unless you're blaring-alarms-levels of hard to wake up and don't have neighbours or a partner, these guys don't have an indoor voice.
Point is you're then forced to care for the pet, wether it wakes you to go out, get food or get cuddles and bob's your uncle: your chances of picking up your phone and doomscrolling first thing in the morning are much lowered.