I found a way by using the available Serilog options, even though its not the same, it does the hiding:

"Serilog": {
    "MinimumLevel": {
        "Default": "Information",
        "Override": {
            "Microsoft.EntityFrameworkCore.Database.Command": "Error"
        }
    },
...

Keeping the question open for a little in case someone knows a better variant.