More than two months after the release of the Bugs & Bees update, the first version of Optifine for it finally appeared. At the moment, this is an unstable release, some functions are still missing, and also there is no compatibility in Forge.
Currently, Optifine may be unstable. Also, it lacks such functions:
custom sky texture.
Some other functions may also work with errors. But if you still need optimization in the new version, then you can download Optifine for Minecraft 1.15.2 now and check whether the FPS will increase in the game from this.