Format Multiple Sheets At Once

I have 14 worksheets in a workbook.

All sheets are identical in that they have the same headings within the same range.

I want to apply formatting (bold some text, apply borders, center, etc.), but to all the sheets at once. I know I can do this with a simple loop, but I was wondering if there is a more efficient way of doing it.

I've been playing with

sheet( array(sheet1.name, sheet2.name))

I don't think I have correct syntax or use using the the above.

I tried coding what I would do if I was performing this manually, which is to select all the sheets and apply the formatting to sheet1. Then all the sheets would have the formatting.