This is an odd one. When I do a search for the part numbers printed on the parts themselves, 01478-A comes up with an eBay listing that says it's for an iPad Pro 1st gen.
[link|https://www.ebay.com/itm/225599014937|Genuine iPad Pro 11" USB-C Charging Port (1st Gen) 821-01478-A - 821-01478 / 235|new_window=true]
Unfortunately, the seller did not provide a decent picture of the part they're selling, so you can't really look at it and see if it matches yours. :(
According to the compatibility list, the port they're selling is supposed to work on pretty much all of the iPad Pro models, 1st through 4th gen. If I search for the part number on your replacement part, it also only comes up with one listing.
[link|https://www.componentidigitali.com/en/componenti-digitali-home-page/spare-parts-for-mobile-phones/spare-parts-for-apple/ipad-pro-11-2018/flat-ricarica-per-ipad-pro-11-2018-2020-12-9-2018-2020-nero.2.39.645.gp.21224.uw|21413 - FLAT RICARICA PER IPAD PRO 11 2018/2020 12.9 2018/2020 NERO - Compatibile - 821-01478 821-03135-A|new_window=true]
This one lists both part numbers though, implying that the two parts are compatible and interchangeable.
Not exactly sure where to go with this next. What's the model number printed on the back of your iPad (the one that starts with A)?
Since you bought the part right here on iFixit, it might be worthwhile to contact their Store personnel and see if they have any ideas or suggestions. Best way is to email them at support@ifixit.com.