Sadly, there is no straight option to "filter out" anything. If you want something not being shown (like SDXL models) you need to chose SD 1.5 models for example. So, you would see just 1.5 models w/o any other.
You can also choose all desired options except SDXL base. So, you would see all of them.
Yes, the basic funnels in the top left corner has SDXL filtering function.