Recreating Protonmail VPN

[mahesh]

I had PM VPN using Win10 until about two weeks ago, when I decided I'd learned enough about Ubuntu over the years to rid myself of Bill Gates and MS.
I had all of the pieces together to create USB Ubuntu 22.04. Pushed the button and wrote U 22.04 all over my hard drive. I finally had to give up on recovering my former PM account, so I've created a new PM account, and am trying to do what should be a stone cold simple install.
What is going on here? It looks to me as if I downloaded the package I needed, but then it says "not so fast".

sudo apt-get updateHit:1 http://us.archive.ubuntu.com/ubuntu jammy InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:3 http://security.ubuntu.com/ubuntu jammy-security InRelease
Hit:4 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease
Reading package lists... Done


Laptop-15-gw0xxx:~$ sudo apt-get install protonvpn
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package protonvpn

Thanks again for your patience and help.