The system is called the Information Return Intake System (IRIS) and is not intended to replace FIRE, but apparently will supplement it for now. Geared toward smaller users, users can file electronically without separate software. You can submit 100 forms per batch, (but I don't see a limitation on how many batches you can do.)
Per the IRS:
As a result of Section 2102 of the Taxpayer First Act, the IRS is launching an online portal that will allow taxpayers to electronically file both small and large volumes of Forms 1099, according to Mankowski. "The new portal, known as Information Return Intake System (IRIS), will launch in January 2023 for tax year 2022" he said.
Information about the new portal, including how to sign up is in Pubs 5717, 5718, and 5719. BUT - on page 4 of Pub 5717 it says "ALLOW UP TO 45 CALENDAR DAYS FOR APPLICATION PROCESSING." I don't know if the portal application processing is even active yet.... so I wouldn't count on it for 2022 forms.