No, the tricky part is where you conclusively link the cosmological constant to vacuum energy with no evidence for and a lot against. There are equally plausibl

No, the tricky part is where you conclusively link the cosmological constant to vacuum energy with no evidence for and a lot against. There are equally plausible theories that connect dark energy to completely different things like the Higgs field, or just leave them unrelated, so appealing to demonstrations of vacuum fluctuations as evidence of dark energy being "experimentally verified" makes about as much sense as calling string theory "experimentally verified" because it agrees with the QFT/GR in the proper domains. What verified, novel predictions do any of the plausible theories make that makes them the defacto solution? I'd be really curious to know because it doesn't appear that many physicists are aware of this defacto solution.