Native 1440P laptop to a 1080P monitor question

[Fleetboy2024]

My question is simple

I have an Acer Nitro laptop with R76800H and RTX 3070 ti, its got 1440P 165HZ 15"

if I connect it to a gaming monitor, (lets say a 1080P 144HZ gaming monitor)

Let's say, I'm testing Cyberpunk, here's my question

• will it look bad (blurry or something) being downscaled when I adjust in game resolutions to 1080P on the monitor? (I don't care how it will look like on the laptop screen)
• Do I need to make adjustments on the refresh rates? (because my laptop is 165 and the monitor is 144)
• Should I use Duplicate or Extend? (my goal is to make the 1080P monitor look really good for gaming and recording gameplay)