I found that after logging into the account, the game limits the frame rate cap. The specific steps to reproduce are: launch the game, then log into your game account, exit and restart the game, create a world and enter it, and then you will find that the frame rate is capped at 70 FPS. If you do not log into the account, the game does not have such a limitation. If the issue is successfully reproduced, your game frame rate will be capped at 70 FPS, but in reality the frame rate may drop to around 30 FPS.
After logging in to your account, the game still runs at 70 frames even if you disconnect from the network.