For players that play with mods, Forge 1.17 is still in the works. It is unknown when it will release but we can expect it to arrive in the next weeks or months. Also note that mods for the version may be scarce as the new update has just been released.
▲ Optifine 1.17 on the left and vanilla Minecraft 1.17 on the right:p:Optifine has released a 1.17 preview to tie in with the official release of the latest version of Minecraft. It includes visual and graphical options that users are familiar. Currently, the Optifine 1.17 preview build supports shaders.How To Download Optifine 1.17
Update 1.18 Coming This Year
As the update has been split into 2 parts, Update 1.18 will arrive later this year. Expect more content and improved world generation to come with Part 2.