If your requests from Overseerr to Radarr failed, the solution is to clear the failed requests and resubmit them.
Have you checked in Overseerr if they failed and what the failure was?
Your issue appears to stem from a failure between Overseerr and Radarr (though I don’t have nearly enough information to confirm that). Assuming the issue is due to a configuration problem between Overseerr and Radarr, you have to resolve the failure(s) and will likely need to resubmit your requests because they failed.
Currently we (the community here in the Overseerr Discord) don’t have any evidence provided by you that the requests from Overseerr were successfully sent to Radarr. So we can only assume they failed, and so you’ll have to clear the failed requests and resubmit them only after resolving whatever issue is preventing them from making it to Radar successfully 😅
To summarize, if you’re wanting Overseerr to automatically retry failed requests, that isn’t a function of Overseerr if Overseerr did its job but a configuration issue with Radarr existed.