Studies are rarely replicated exactly, which means drawing a line between replication and something new; this could be difficult.
You could use Google Scholar, click on the papers that cite the original work, and then search on the word replication within these matches.
Surveys of a field should cover the various replications that have been performed, along with providing some context.
Websites where you look for studies have lots of tools to narrow results, but don't have one for "find all replications of this study". Is there a convenient way to do that? With the replication crisis, this seems very useful.