Hello, I do agree this should be better documented to prevent people spending money on incompatible memory for what it's worth here is another post about corsair memory.
According to the table in the documentation about this laptop found at this link: Inspiron-15-5515-laptop_users-guide_en-us.pdf. It says that the laptop can support dual-channel by installing 2 x 16GB of memory at 3200Mhz. So I bought to install the following memory: VENGEANCE® Series 32GB (2 x 16GB) DDR4 SODIMM 3200MHz CL22 Memory Kit. But it gives me errors when installing it, it tells me that it doesn't support it, then I don't know which memory to buy because I am installing the correct memory according to the documentation. Attached image of the error  .    Does anyone know how to fix it, but to return it to warranty.
Dell Inspiron 5515 amd ryzen 5500u tengo problemas para instalar nueva memoria 
RAM