PingPlusFps is a client mod that allows you to track your insane ping and fps. (image below)
Please check THIS (more modern and supported): https://www.curseforge.com/minecraft/mc-mods/custom-fps-display
Available command:
/customize_display <x> <y> <colorHex> <scale> command to change the position, color, and scale of the display.
xandy: Coordinnates of where you want to put the new position.colorHex: Set the color in hex (e.g.,FF0000for red).scale: Set the size scale of the text
Discord support server of the mod: https://discord.gg/S7mTtZxJZh