The car would automatically shift gears if it stayed to long, the car won’t let you ruin it. Don’t worry you didn’t hurt anything.

I have done that before with no problems.


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My transmission didn't upshift which is why I'm asking. I'm really surprised it didn't shift out of first gear considering it'll do that otherwise in any other gear. I was in manual mode. Had a brain fart and didn't upshift until a second later.

 

I still don’t think it’s a problem, I do it in my 2009 corolla with a manual and it doesn’t hurt the engine.


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There is a bit of a safety margin. Redline isn't the point at which the engine will grenade, it's just the highest speed the engine is designed to be run on occasion.
Any time above cruising speed is impacting engine life, but if nothing blew up at the time, it's fine.
The main risk at high RPM is valve float, and you'll know it if a valve hits a piston.

 

The rev limiter served its purpose.

 

Don't feel bad, I've accidentally bumped the shift "paddles" on the steering wheel of my SE and had strange things happen. As if I could use them any better than the computer does it.

 

The paddles gave me a chuckle on the CVT in my '16 Corolla, but it turns out that I did use them occasionally for engine braking when not using cruise control.
When using cruise, the system handled engine braking on its own.

I get even more of a chuckle out of the paddle shifters and tach display option on my '21 Avalon XSE Hybrid.

 

You're fine. The car is designed to do that if you want to. Some people redline their cars everyday.