I have discontinued Singularly Optimized, Wasn't easy but I wanted to.
I never planned to keep this up to date with minecraft, reason being why it was on 1.20.1. So I recommend using Fabuolusly Optimized because it runs better than us, You can make your own version of this, I really don't mind, Just mention me in the credits (or not I dont mind).

Singularly Optimized: A modpack designed to enhance your Minecraft experience in both singleplayer and multiplayer.

What We Can Do!

• Achieve 120+ FPS for smoother gameplay in both singleplayer and multiplayer!
• Enjoy faster loading times, better graphics, and overall smoother performance.
• Whether you're building solo or adventuring with friends, experience Minecraft with less lag and more fun!

If you're unsure which mods to add to reduce lag in singleplayer or multiplayer, just download this modpack. It can solve 70% to 90% of the lag issues.

Minimum Requirements

• At least 4 to 6 GB of memory to remove stutters.
• CPU with 4 cores or more.
• Geforce GTX 770 or better (or any other kind of graphics card).

Maximum Requirements

• At least 5 to 8 GB of memory to remove more stutters.
• CPU with 6 cores or more.
• Geforce GTX 1660 or better (or any other kind of graphics card).

And since this is made by one person, expect versions that you are limited to.