Change the size of font in the Notes Application on your computer to a larger default font size
While on your MacBook, Got to System Settings
A window will open. On the left side of the window find the Accessibility tab and click on it.
Once in Accessibility look for the section that says Text and you will see Text Size as the first option.
Click on Custom >
Once in custom, you will see a Display window pop up. Look for the Notes Icon and you will see that it allows you to increase or decrease the font size by clicking on the up ^ arrow or down v arrow.
This will allow you to change the text size of the Notes Application. The max text size is 24pt
Click Done once you have selected the font size and that should do it.
MacBook Pro 16″, macOS 14.6