Attaining understanding of the past can have predictive value. The massive exploration capital expenditure of the fossil fuel industry is entirely guided by conventional geology, and payback is definitely expected. The discovery in 1980 that there was an iridium enriched layer at the K-Pg boundary led to the prediction that evidence of a source impact event might be found; soon afterwards evidence began to present that the meteorite responsible was linked to the Chicxulub Crater, and after much investigation by 2010 the identification was broadly consensus.
A biologos article lists four predictions coming out of mainstream historical science well ahead of their discovery, including the existence and frequency of the Cosmic Microwave Background, the Chicxulub crater, the transitional Tiktaalik fossil, and the molecular clock divergence of marsupials.
That humans have one less chromosome than other apes was once, and still is, presented by apologists as another evidence of special creation. Biologists maintained that common descent required that a fusion had to have occurred, but early on had no direct evidence. In 1982 Junis and Prakash showed that banding of human chromosome 2 showed a pattern matching a combined chimpanzee 2A and 2B, and since then DNA sequencing data has yielded detailed confirmation.
Historical science has even anticipated experimental nuclear physics, with Fred Hoyle predicting in 1953 that a pathway would be found to allow for the stellar nucleosynthesis of carbon, based on scientific cosmology which states that all elements heavier than lithium must have been forged in stars. This nuclear resonance allowing for our existence was experimentally detected at Caltech in 1957.
Fulfilled prediction is often considered the hallmark of a successful theory or model, although what really matters in the end is the evidence itself no matter if it was anticipated or serendipitously happened upon. Although in principle science is skeptical and all theories are tentative, in practice scientists build on the existing body of knowledge, standing on the shoulders of giant and not so giant prior contributions. Nothing would get done if researchers had to start each day first reproving everything in scientific history. Most tests of hypothesis have a tinge of expectation, and this is true in regards to investigation of the past as well as experimentation.