2020 won’t shift into reverse

2020 FE LXS

2L engine 4 cyn

Last week, the RPMs were jumping up and down while driving.

This morning, it won’t shift into reverse. When I put it in R, its like it doesn’t catch.

Having it towed to the dealer now, but curious as to what happened. Last week a poster suggested it didn’t get a software update, which was helpful, but now it seems like something serious.