If you have requested an absentee ballot but have not yet received one, contact your local election authority to confirm that they received your absentee ballot application and verify there were no errors in processing.
Some states will allow you to track your absentee ballot online. At vote.org,
there are links for each state’s ‘Election Center’ at the bottom of the
page. On your state’s page, under ‘Offsite Links’, there will be a link
to an ‘Absentee Ballot Tracker Tool’ if your state offers one. If not,
look up the contact information for your local election authority and contact them directly via phone or email.
If you run into trouble (e.g. they say they have mailed you a ballot
but you have not received it), they should be able to help you identify a
variety of alternative solutions, which will vary by state.

https://studentaffairs.psu.edu/involvement-student-life/student-services/voter-registration-election-information/facts-about