A small mod with which foliage blocks will no longer block the passage of the player / mob, but only slow it down. In this case, if you or the mob will move too quickly, then damage will be inflicted.
Fabric Passable Leaves Mod for Minecraft 1.15.1/1.15
The mod, of course, is not required to be installed, but on the other hand, with it the game will become much more realistic.
Download Link: passable_leaves_0.1.2