Amazon has even started to copy casios.

https://www.amazon.com/dp/B07YQFHVJF/ref=cm_sw_r_cp_awdb_imm_ET5YMQ5N9GVXEYTNZ53R

You can find other brands on Amazon that are blatant copies of casio watches. The most prominent I have seen is SKMEI. But there are others as well.

Finally in shady parts of my town you can find cheap casio fakes under the brand CASLO. These are around a dollar each and they look that they are not even worth that much. At least the fakes on Amazon look like they could pass as casio.