Irs accepted my refund on January 16th. Still have not received it. Was suppose to get it in 21 days. Is the IRS on a delay??

The 21 days is only an estimate, it is not a promise.

Only the IRS and your State control when and if a Federal or State tax refund is Approved and Issued.

If accepted by the IRS use the federal tax refund website to check the refund status - https://www.irs.gov/refunds

If accepted by the state use this TurboTax support FAQ to check the state tax refund status - https://ttlc.intuit.com/questions/1899433-how-do-i-track-my-state-refund

After the tax return has been Accepted by the IRS (meaning only that they received the return) it will be in the Processing mode until the tax refund has been Approved and then an Issue Date will be available on the IRS website.
See this IRS website for federal tax refund FAQ's - https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions