I tried installing netspeed via terminal but no luck, also tried to find out it on Ubuntu software app but there also no such app available, it seems like there is no netspeed for Ubuntu 20.04, please help me.
Your solution is here ...
https://github.com/hedayaty/NetSpeed
clone project by
git clone https://github.com/hedayaty/NetSpeed
cd NetSpeed
make install
make enable
Output is zip file, extract to your local config path.
Restart ubuntu, open "tweaks" to customize.
netspeedpackage seems to have been dropped from Ubuntu sometime after 16.04...four years ago. Perhaps a newer alternative might be acceptable? – user535733 Apr 28 '20 at 18:38