Hey buddy! All good for ya?
No, you don't need to worry there is no risk of thermal runaways. You need a lot more current and a possibly voltage of maybe 23v to reach the dangerous zone with EBgen2 strips. With a 20v driver its only possible when you take the A version and set the voltage to max settings. With your driver its perfectly safe and your strips run anyway in constant current mode with 19,6v.
For dimming I recommend this 6$ dimmer from rapidled simply because it use 0-10V dimming without the need of an additional 10v power supply. It works with the little current flow on the dimming output (100μA typ., see screeny below) of the driver and you always get the full driver power without modified 108k poti, additional resistors or disconnected dimmer wires. I have used a simple on/off switch next to the poti to disconnect the dimming circuit in my first build. Without testing the true resistance this poti could have only 80k or so. Do you have a multimeter to check resistance when full turned open? But you need to disconnect the dimmer wires befor testing otherwise you would measured the driver output.
https://www.rapidled.com/cased-potentiometer-with-knob/
That's the dimmer, just two wires to connect. Seems relatively new cuz to date I've not seen them anywhere else..
View attachment 4220936
And here is the corresponding part in the datasheet..
View attachment 4220938