This is strange, when I open your file with Blender 4.5 and LuxCore 2.10 on my MacBook and hit render I get caustics immediately
What hard- and software do you use?
Still I made another file with some changes:
- switch to BiDir with 4/4 Bounces only because Hybrid engine does not work with skylight caustics efficiently
- use Metropolis sampler and uniform light strategy
- adjust caustic cache settings
- 1 min sample time is too short, use 256 samples + denoiser instead
- attach sky to sun light in light settings
- use scaled down ocean instead of displace modifier, add subdivision after displacement (and smooth shading)
- pimp up the glass material with blue volume and a metal surface component to catch the sun reflections
