2. Enable the legacy Text Import Wizard as per [0]
3. Go to Data -> Get Data -> Legacy Wizards -> From Text (Legacy)
4. Set config based on your CSV file, typically select "Delimited" and "My data has headers" enabled
5. Click Next and pick the delimiter, typically "Comma"
6. Click Next and click the columns with UPCs, select "Text" in the "Column data format" area
7. Click Finish
(I'm not saying this is great, just sharing how to do it in case you don't know)
[0] https://professor-excel.com/import-csv-text-files-excel/
edit: you can also set up a PowerQuery query that will always open some CSV at some path and apply this config, but I don't want to have anything to do with PowerQuery, sorry.