Less FPS in Minecraft than in games that require more power?

I have not assembled a first PC (GPU: GeForce GTX 1660ti, CPU: Ryzen 5 2600) and in games like Fortnite I have consistently 200-300 FPS with Minecraft (with Optifine) at the lowest settings, without malware and texture packs, only around 120- 130th What still surprises me: when I started the game for the first time, I still had around 400-500 fps, but when I went back in the next day, I only had the numbers mentioned above. Why is that and how can I fix it, because I would like to play with shaders

V sync maybe off

Is out

Seriously… Do you still notice the 130 to 300 fps?

That is not the point, but I would like to know why

Well if you don't notice a difference then why want to solve a nonexistent problem?

Why do you think Fortnite needs more power than Minecraft? Most games use the GPU, Minecraft uses your CPU much more. Thanks to Java only one core where other games use all cores. Minecraft can't be compared. You can use shaders with the system without any problems. But you can't get much more FPS.

I just reset all graphics settings in Minecraft and now have around 800-1100 FPS