The Oppo Find N5 I mentioned earlier has a dual sim card tray (Global Version), it also has esim capabilities. I am currently running 2 T-Mobile sim cards in mine. I have not been able to get IMS working on it so far however. It is really a remarkable device, a Qualcomm Snapdragon 8 Elite processor, 5600mah battery with 80 watt wired, 50 watt wireless charging. They claim 80% charge in 30 minutes. Another similar phone is the Oneplus Open folding phone. It is also a dual sim card + esim device with slightly lower specs, but a solid performer. I bought one of those before the Oppo N5. I’ll probably keep it as a spare for a few trips.

Buy once, cry once, but the tablet feature of a foldable phone is truly awesome in a travel phone. They generally have a split screen mode also, which is very useful on the road.