Those are lithops, or as I like to call them, "challenge mode succulents". Yes you're definitely going to want to repot those. 90% pumice/small stones to 10% succulent soil is what they need to be in. They're extremely easy to overwater. They're dormant during the summer and winter, so don't water at all during those times. Only water sparingly during the fall and spring, as long as they're not splitting. When they split DO NOT WATER.
@Yollymac I think it's pure peat, these guys were never replanted before ._. Not sure how long this soil stays moist after a watering but I'm kinda scared of trying to replant them, if I tear their roots I'm causing more harm than good
@ionasan I have all my lithops in a normal succulent soil mix without a problem, if the overwatering issue is the only reason why you think I should repot them then I think they're fine the way they are. Making them grow new roots without pumice is way harder than simply watering properly. Pumice is not available in Hungary.
There are a few things you can use instead of pumice. You can use very course builder's sand, also you can use zeolite which is available from most pool shops in the filter section and you can also use akadamia. Or a mix of all of the above with the organic medium to the smallest percentage minimum. Ps. On a side note, peat moss promotes new root growth. I use it to root various cuttings cuttings including lithops with poor roots all the time. 😊