The next two non-flagship Samsung smartphones to receive Android 12 updates in the US are two 5G-enabled handsets: Galaxy A42 and Galaxy A71. The latter has already received the update at Verizon a few days ago, but the unlocked and US Cellular models are getting it starting today (via SamMobile).
The much cheaper Samsung Galaxy A42 5G is being updated to Android 12 too, but this particular phone is only getting One UI 4.0, whereas the Galaxy A71 5G update has the One UI 4.1 included.
As far as the security patch goes, the Galaxy A42 5G is being bumped to March 2022 security patch, while the Galaxy A71 5G is getting the newer April 2022 security update. Both updates are rolled out in waves, so it might take up to a week to reach all customers.