Fps affect games?

Does have high fps affect your game ?

yes, brings consistency in your movement and gunplay

Play with 1 Fps you will get the answer

yeah, even if your monitor refresh rate is low

Yes, FPS even affect "sound latency"
Sound latency is something that people don't really care but it affect your gameplay so much.
I did some test in valorant and with 400fps I got 170ms audio latency (P2)
with 144fps cap I got 280ms sound latency.

Yes, but only to a small degree (presuming you are already playing above 60fps anyway)

I play with 20-40 fps and lose most of gun fights, so I’d say it definitely affects your game.

big YES

yes, the less fps the better
it's like input lag