The RAM in this model is soldered and not upgradable beyond the built-in 8 GB or 16 GB configurations. It does not support upgrading to 32 GB or 64 GB RAM.
Specifically, the Lenovo V15 Gen 4 with AMD Ryzen processors has memory soldered to the system board with no additional slots, supporting up to 16 GB soldered RAM only. Therefore, upgrading to 32 GB or 64 GB is not possible.