All the vibrating alarm clocks I could find do not sync with your phone, and have to be set manually. I thought about getting an Arduino, but then I will have to build the whole thing by myself. The only logical conclusion I could come up with is to get a programable vibrator. But most of them are either very expensive of look too much like a vibrator (sus).
This is the closest I got: https://www.amazon.com/dp/B09NNFPHXG https://www.amazon.com/dp/B0CD7FPFQ5?th=1
Do you have the option to go to bed early enough that you can just wake up at the desired time without an alarm? May not work effectively till you’ve recovered sleep debt. You may need to sleep in late a few weekends to recover sleep debt, but don’t get carried away such that you can’t sleep that night. It also helps to tire yourself out with exercise so you can sleep when you want and then wake up without an alarm.
For other options, try a programmable butt plug maybe