Browser won't trust https for my .NET Core project

I tried to run my ASP.NET Core Web API in Visual Studio Code using https on Brave but I get an error

Your connection is not private

I tried to use

dotnet dev-certs https --cleandotnet dev-certs https --trust

and also tried to configure it manually using localhost.crt and converting it to a .pfx, but that didn't work either.

Is there a better way of getting the browser to trust https without these issues?

Current OS: Linux Mint
Default browser: Brave