Listed below are possible topics for master's theses. Unless there is a specific restriction stated in the topic description, the above topics in Section A may also be chosen, but usually in a more expanded or advanced form to meet the (methodological, formal, etc.) requirements of a scientific work.
In our experience, the topic of a master's thesis often naturally evolves from, or shares the same research area as, your P2 project (assuming you have completed it with our research group). In this case, you may want to reach out to your supervisor(s) to discuss possible directions and ideas.