The iPhone 16e Tech Specs page lists 3G (UMTS/HSDPA) support. It's missing CDMA, but they already dropped that way back with the iPhone 14

https://www.apple.com/iphone-16e/specs/

5G NR (Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n29, n30, n38, n40, n41, n48, n53, n66, n70, n71, n75, n76, n77, n78, n79)

FDD‑LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 29, 30, 32, 66, 71)

TD‑LTE (Bands 34, 38, 39, 40, 41, 42, 48, 53)

UMTS/HSPA+ (850, 900, 1700/2100, 1900, 2100 MHz)

GSM/EDGE (850, 900, 1800, 1900 MHz)