Do not mail it again. The IRS is behind on updating their website. The IRS is taking a long time this year. Plan on 6 months or more. All you can do is be patient and keep waiting. Even efiled returns are taking 6 months.
The IRS is still processing 2020 returns. As of June 21, 2022 the IRS is almost done processing 2020 returns, filed in 2021. See,
IRS continues work on inventory of tax returns; original tax returns filed in 2021 to be completed t...
And see
IRS Operations During COVID-19: Mission-critical functions continue | Internal Revenue Service
