Apple Refurbished items come in a plain white box (no graphics) and also say “Certified Refurbished” on the front in small grey font. I’ve ordered tons from Apple Refurb; Macs, phones and watches all come the same way as I described.

https://www.google.com/imgres?imgurl=https%3A%2F%2Fstore.storeimages.cdn-apple.com%2F4982%2Fas-images.apple.com%2Fis%2Frefurb-ipad-mini-wifi-gold-gallery-2019_AV3%3Fwid%3D1144%26hei%3D1144%26fmt%3Djpeg%26qlt%3D90%26.v%3D1581986623356&tbnid=RTzsSusKI_NgjM&vet=1&imgrefurl=https%3A%2F%2Fwww.apple.com%2Fshop%2Fproduct%2FFUU62LL%2FA%2FRefurbished-iPad-mini-5-Wi-Fi-256GB-Gold&docid=k7uASAH923fIeM&w=1144&h=1144&hl=en-us&source=sh%2Fx%2Fim%2Fm4%2F3

iPhone 13 at minimum. An SE would be an insult.