How to test geforce now latency

I get a ‘spotty connection’ (high latency) in Geforce Now. I’m using a supposedly fast connection. Is there a way to check latency against Geforce Now servers or display ping when running the Linux app?
I don’t see a “test network” option like there is in the windows app. I installed this app via snap if it matters. If there is another app for linux, I couldn’t find it.
My machine has GTX 960 GPU. I am connected through ethernet online: I have a cat7 cable going to the router, and a fiber optic cable to the ISP at 1GB/s. Also I’ll mention that I am connecting from Israel.