dotnet sdk is installed but not recognized – Linux Ubuntu/popOS 22.04

I had the same problem, and here’s what I did to resolve it.

1. Removed all .NET packages
   sudo apt remove 'dotnet*'
sudo apt remove 'aspnetcore*'

2. Deleted PMC repository from APT, by deleting the repo .list file
   sudo rm /etc/apt/sources.list.d/microsoft-prod.list

3. Ran sudo apt update

4. Installed .NET 6 SDK via sudo apt install dotnet-sdk-6.0

This is one of the solutions provided on the Github issues page for dotnet/core, please follow the original article if the above did not work for you.
https://github.com/dotnet/core/issues/7699