The way to know that the return was received would have been to use a mailing service like certified mail that would have confirmed for you that the return was delivered to the IRS. If you did not do that, you will have to wait while the severely backlogged IRS gets around to opening your envelope. That might take six months or even more. By the time they open it, they will only be showing information about 2021 returns on the refund site.
Eventually you might get though on the phone but the IRS only answers a small percentage of the calls made to them. Do not expect quick results from mailing your tax return.
To call the IRS:IRS: 800-829-1040 hours 7 AM - 7 PM local time Mon-Fri
Listen to each menu before making the selection.
First choose your language. Press 1 for English.
Then do NOT choose the first choice re: "Refund", or it will send you to an automated phone line.
Instead, press 2 for "personal income tax".
Then press 1 for "form, tax history, or payment".
Then press 3 "for all other questions."
Then press 2 "for all other questions." It should then transfer you to an agent.