Is post-meal drowsiness due to blood sugar spikes?

I experience severe drowsiness after meals, which significantly interferes with my daily life. I initially thought it was simply due to fatigue, but after researching, I learned that it may be related to blood sugar spikes. I understand that post-meal drowsiness occurs as blood sugar levels rise and then drop rapidly, and I am curious if this is actually a common occurrence. It seems to be particularly severe after eating foods high in carbohydrates or sugar, so I am concerned that I may need to manage my diet. Are there any lifestyle habits that can help reduce post-meal blood sugar spikes or alleviate post-meal drowsiness? Sharing your experiences or advice would be of great help.