If you have a csv or tsv file in your repo, GitHub will automatically display it as a table that you can search and filter on.
Similar to source code, you can click a row (or shift+click multiple rows) to highlight, and copy that URL to send to someone, e.g. https://github.com/saraford-tips/fluffy-octo-robot/blob/master/inventory.csv#L6-L8
You can also search within the spreadsheet. Although I couldn’t find a keyboard shortcut, as ‘s’ goes to the overall search this repo search box.