Pot lights under kitchen cabinets

This is pretty common with older under cabinet puck lights. Many of these are either sealed LED fixtures or have hidden spring clips holding the glass in place, which is why twisting or pulling doesn’t work and there are no visible screws. If the glass isn’t obviously loose, it’s usually not meant to be removed. I’d avoid prying any harder since the glass can crack easily. Take a close look for a thin metal retaining ring around the edge. If you don’t see one, the fixture is likely a sealed unit and would need to be replaced as a whole rather than just changing a bulb. At that point, removing one fixture carefully to identify it is the safest next step.

As I have noticed your frustration with your current setup, it is highly suggested to use services of a pro rather than causing any accident. Electricity and Gas jobs are not worth trying yourself. That is the best I can suggest. I recently fixed a Bosch Wall Oven in an apartment and realized the electrical system is really screwed in the unit. Switching bedroom light on turns off MCB. Some others lights not working. Oven and Microwave both resulted with issues due to electrical issues in the apartment. Electricity is not simply a positive and negative wire or power and neutral wire but there is very important part of it called ground wire and very important for safety purpose. So kindly call in a professional to save yourself hassle. If it is a portable LED units operated with batteries, for sure you can play around with it. Do not play and ask for help online for real electricity either 110V/220V or stepped down voltage devices.

Try pushing the glass UP slightly, then twist counter-clockwise (don’t pull while twisting