Hi, and welcome to the forum!
Unfortunately, this is to be expected.
The reason behind that is due to a package format used in Linux (one of many, anyway) called Flatpak. As with most things, there are pros and cons, and you've stumbled upon one of the cons which is that they take a lot of storage space.
By today's standards, some would argue that this isn't really all that much, but that is a very relative since not everyone has massive drives or even the same storage needs.
How to handle this can be tricky. I would suggest spending some time reading through these related threads. It will give you an idea of what are your options and how to handle them.