A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I believe the issue is the zoom setting on the web page. This will change the appearance of the whole page including the ribbon where the Excel zoom will only change the cell region of the spreadsheet.
I am using Edge. If you are in a different browser, you will need to find the same settings for that browser. Make sure that your browser is not in Full Screen so that you see the tabs. F11 is the key for that on my computer. Then click on the three dots in the upper right to get the browser menu and adjust the zoom to 100%. I am guessing that it is very low currently.
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