I've created a shortcut that allows you to append today's note with a transcribed voice memo. I've assigned it to the action button on my phone so that I can press the button, say something, and have that automatically added as a bullet item to the end of today's note.
https://www.icloud.com/shortcuts/8a81ac9e69314c75b38a0902e55df3d7
Note: This assumes that the current year is listed the end of your note.