Single Pole Dual Dimmer led light switch

Single Pole Dual Dimmer LED light Switch like in attached image
Can be smart or not
Hopefully posted in correct area

I was looking for something very similar. The only 1gang 2pole switch that I found is the Zooz double switch:

I just installed it. Its seems to be working well.

Is both dimmable for LED lights

No. The top is dimmable. The bottom can control another physical device (on/off) or can be be used as a smart button. It does have push, hold. double tap, and release. So you could use a smart bulb and set up some kind of dimming. I'm not sure how intuitive that would be though.

If it doesn’t have to be smart, then why not use the Lutron Maestro dual dimmer that is in your picture?

a few say it works more say does not or flickers

Lutron has a list of LEDs that work with their dimmers. If you stick with that list, you won’t have any issues.

https://www.lutron.com/en-US/Pages/LEDCompatibilityTool/Compatibility.aspx