Im making a shader for Minecraft and after upgrading the template from 1.21.5 to 26.2 I implemented waves to water.. It took long 😭 but it wasnt that difficult. I also added a pciture here.

With mc_Entity i added blockID for specifically Water to the IDs 10034 and 10033. For the animation I used sine and cosine functions.
After i styled the Water by blending its texture with a blue tint:

vec3 waterColor = vec3(0.1, 0.4, 0.8);

Though, because it was all the same color, you couldnt really see the waved that were further away than 3 blocks, so I implented a bit of shadow:

shadow = texture(shadowtex0, shadowCoord.st).r;albedo.rgb *=mix(0.5, 1.0, shadow);