Should I be worried my refund said est 04/23/24 and still nothing it's been over 21 days.

The date shown on the TurboTax Tax Home webpage is only an estimate, it is not a guarantee.

Once a tax return has been Accepted by the IRS or a State, TurboTax receives no further information concerning the tax return or the status of any tax refund.

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

When entering information on the IRS federal tax refund status website, you must enter exactly what is on the federal tax return that was filed and accepted by the IRS.  Your Social Security number, the Filing Status and the whole dollar amount of the federal tax refund as entered on the Form 1040 Line 35a.