I just tried this out. On my local server I get good frames, near 60, but it only uses my integrated UHD 620 graphics.

On vanilla it automatically takes my Geforce MX150 graphics, and gets 40-60 fps

or is there any way i already can do it manually?

https://www.quora.com/How-do-I-make-Minecraft-use-my-Nvidia-GPU#:~:text=Select%20Manage%203D%20Settings%20on,click%20the%20Program%20Settings%20tab.

This isn't something we can control within Sodium.