It is your refund sent by check, then it can take a couple weeks once the IRS or State issues a refund date.  You would have to check the IRS website & your States website (if you have a State refund), to see if your return was fully processed & your refund was approved.

You can check the IRS website, Where's My Refund, the website updates once a day.

https://www.irs.gov/refunds

How do I track my state refund?

https://ttlc.intuit.com/community/refund-status/help/how-do-i-track-my-state-refund/00/25571