If you paper filed in march, it means that it took 7 months for the IRS to notice that you did not sign the return. That tells you how behind they are. If it takes another 7 months for them to process the return, it will mean that it would be ready by May. I would not waste my time calling them again until the tax season is over. Wait until May and call them then.
If you recently prepared your 2021 tax return, there is an outside chance, that the IRS would want to see the prior year return and that may alert them.
