Glad that I helped you!
Knowing the name you can know how to care for them.
In one pot you planted cacti that need different watering.
Mammillaria needs to be watered very carefully, little.
Gymnocalycium is watered more often. He likes a still warm shower after winter rest.
Mammillaria can't stand it! It must not be exposed to water.
In this post, I am writing how to replant purchased cacti, this applies to all cacti:
https://hive.blog/gardening/@ludmila.kyriakou/cactus-transplant-gymnocalycium-ragonesei
I really like cacti, I have cacti that are already 36, 35 and 34 years old. I have more than 400 of them    :-)))
I became cactus addicted    :-)))