Hi @Suchit_Kharatmol ,
while I don't have a specific answer for this, Jira does provide a way to import generic data e.g. through CSV - https://confluence.atlassian.com/adminjiracloud/migrating-from-other-issue-trackers-884344525.html. If you are able to export your Work or Backlog items to CSV, this might be a good option.
Furthermore, if you need to associate your Jira issues with your Salesforce records, there are connectors available to do the job (https://marketplace.atlassian.com/search?query=salesforce), and some Atlassian Solution Partners (https://www.atlassian.com/partners/) even provide migration services.
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