There are also EVSEs with dual cords, so it knows what each vehicle is asking for, and adjusts its pilot signal to limit them so they can share the singular input power line. Clipper Creek has one, and I don't think they are alone. Each will get part of the capacity until one finishes, then it will shift the rest of the power to the remaining unit. One box, one power feed, simpler, less expensive option if you are power limited.
https://store.clippercreek.com/featu...al-rugged-evse Those that are smart enough to 'talk' to each other and split the power usually are required to be the same brand to work together properly.