Does it need to be 100/110 and 220v compatible? JP Amazon has plenty of domestic friendly small rice cookers and low wattage grill pot shown on JP YT van dweller channels since they can be run from a LiPo battery unit/portable power station ( Jackery, Ecoflow). There's also one person hot pots.

Yazawa makes an aluminum pan dual voltage hot plate travel setup. It's been manufactured for a good long time Travel Kettle and these days, I might check for a small local market induction burner and a compatible pot/pan with removable handle (also popular in Japan for small apartment dwellers) for more versatility if I needed to cook larger amounts in hotels. I actually own the Yazawa but within some parts Asia, I think I'd just settle for microwave instant rice packets if I just needed hot rice now and then. Some people would prefer a small instant pot style pressure cooker or even a small waffle style grill for their "travel kitchen". Depends on what you like to eat and how you like to cook/prep.