My aunt passed away last year im her POA and i filled taxes for her but never got the refund what do i do now ?

Give the IRS a little more time - it is still a little early to be thinking a 2020 refund is late, especially if you filed by mail.

Since this was a final return, processing may require more time. If you had to file by mail , it could take considerably more time to process the return. 

From the IRS 2020 Tax Season Refund Frequently Asked Questions:

Will calling you help me get my refund any faster? 
No. Our phone and walk-in representatives can only research the status of your refund 21 days after you filed electronically; 6 weeks after you mailed your paper return; or if Where’s My Refund? directs you to contact us. 

What information does Where’s My Refund? have? 
It has information on the most recent tax year refund we have on file for you. 

When can I start checking Where’s My Refund? for my refund’s status? 
24 hours after we’ve received your electronically filed tax return or 4 weeks after you’ve mailed a paper tax return. 

Will Where’s My Refund? show me when I’ll receive my refund? 
Where’s My Refund? will give you a personalized date after we process your return and approve your refund.