I'd go for 99%. My family have a celleron laptop form years ago with 1GB RAM, and that has 64 bit Windows. There's no reason why lenovo would put the 32 bit version on, unless there's some incompatibility somewhere.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
