Using CPU rather than GPU

I've downloaded throne and liverty and I noticed that the game wasn't perfoming as expected. Even on low/medium graphics it was slow and lagging.

My specs are:

Ryzen 5 5600 Nvidia RTX 3060 16 GB Ram B450 Steel legend

So, returning to the main point... I went to the task administrator and realized that the game was using mainly de CPU, tried using graphics on high or epic, nothing changed. Went to Nvidia 3d control panel, the option of usage was the GPU. Tried checking if I had a bottleneck and multiple sites said that i didn't have one. I'm completly clueless about what to do. Help