There's also contact alarms: https://www.amazon.com/3in1-Alarm-Reminder-Adjustable-Seconds/dp/B08MX19M74/ref=asc_df_B08MX19M74/?tag=hyprod-20&linkCode=df0&hvadid=475818912700&hvpos=&hvnetw=g&hvrand=8842497494630192278&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9017231&hvtargid=pla-1185222636856&psc=1

this is gold. thank you. this is exactly what I need https://www.amazon.com/3in1-Alarm-Reminder-Adjustable-Seconds/dp/B08MX19M74 super loud 120dB alarm in 10 seconds if I forget. its safe, and it's classic negative reinforcement to boot.

Something like this could work: https://www.amazon.com/3in1-Alarm-Reminder-Adjustable-Seconds/dp/B08MX19M74

If you search for "door open alarm" or "door ajar alarm", you'll get some more results

Check this : https://www.amazon.com/3in1-Alarm-Reminder-Adjustable-Seconds/dp/B08MX19M74