Excel font data

By default, Excel for Mac uses Body Font in font size 12, which is displayed as Calibri font in font size 12 when you type data in a worksheet, header or footer, or text box. However, you can change the default font and font size for all new workbooks that you create.

https://mk0spreadsheetp99p4q.kinstacdn.com/wp-content/uploads/2020/06/Excel-options-to-change-default-font.jpg

To do this, you'll need to use VBA to identify/interact with the font data within Excel. This page covers quite a bit about how to do things like setting the font type, style, point size, etc. for worksheet ranges or individual cells.

https://powerspreadsheets.com/excel-vba-font/