Galaxy Z Fold 3 has two physical SIM slots and an eSIM - SamMobile
Amazon.com: SAMSUNG Galaxy Z Flip 3 F7110 5G Single SIM 128GB 8GB RAM Factory Unlocked (GSM Only | No CDMA - not Compatible with Verizon/Sprint) International Version – Black
Galaxy Note 10+ with 3 SIM cards using SIMore Speed ZX-Triple Galaxy Note 10+ adapter - YouTube