They will be hard-pressed to survive, let alone recreate any level of technology.
First, food. The planet is "Earth-like" and not a "duplicate of earth". So there is no obvious reason to think that the new arrivals will even know which plants are poisonous and which are not. So, mass starvation. Assuming a duplicate Earth (except for people ever having occurred) allows somewhat better odds. Survival buffs will know which plants are edible, but in general it's not an easy task to live on them.
Rediscovering iron isn't real likely. Not many people nowadays know the techniques for smelting iron with homemade furnaces, nor how to recognize iron ore, or how to make charcoal (without metal tools, mining coal will be a non-starter.) And getting the ones who do together, considering that they are spread out among 100,000 starving people is going to be a real challenge. For that matter, making smithing tools from slag iron is going to a challenge.
I suppose that you might, if you want to invoke extreme luck, have the survivors land on deposits of native copper, which could be worked into copper tools. And don't think that metals such as tin or zinc, which can be used to make bronze or brass are going to be readily available.
Unless some of the transplantees are historical buffs of a rather specialized variety, no one will know how to make stone tools, so things like stone-tipped spears and arrows are out of the picture. Forget hunting. Likewise fishing. Do you know how to make a fishing spear from scratch, and without tools? What plants can be used to make cordage for netting, and how do you do it? Remember, you've generally got less than a month before people start getting weak from starvation.
If the newcomers are really, really lucky, some of them will end up on good seashore, and can start living off shellfish and the occasional tidal-pool harvest. But this is unlikely.
I suppose you can assert that there are enough people who know how to make a fire drill and use their shoelaces to do the job. Or maybe use eyeglasses as sunlight concentrators in order to start a fire, but only for those whose glasses correct for far-sightedness. Correction for nearsightedness uses concave lenses, which will not work.
If the arrivals arrive in northern latitudes (above about 45 degrees latitude, give or take) during local winter, I wouldn't make any guarantees about any surviving at all. Freezing to death is just too quick to start applying survival skills without any equipment. Arriving during winter north of the tropics will be iffy, as well. Consider the Texas cold snap of this past winter.
Frankly, I'd expect any population after 100 years to be a very small number of stone-age tribes with interesting legends.