Is there somewhere a list of parameters we can play with?

[WiliTest]

I did look for this list in the README.md but I did not find it (it would be great to have it there).

I would like to set a delay before killing the notification, but I did not find more parameters that the one shown in the examples.

[Windos]

You can list out all parameters via the built-in help, (help New-BurntToastNotification -Detailed).Parameters

In general, the help across the board needs work. I'm working on a documentation website which will provide a lot more context on everything, but it's a long way off.

I'm not 100% on what you're trying to achieve, there are a couple of levers you can pull to affect the duration of the toasts.

To make it display for a longer time, change the "Duration" (n.b. this is done via the New-BTContent function, as shown in this example.)

It can be made even longer by changing the scenario (again, done via New-BTContent, here's an example.)

New-BurntToastNotification does have an ExpirationTime parameter which takes a datetime, but this doesn't extend the time for the toast. Setting this removes the toast from the action center (and the screen if it happens to still be up), but I've noticed that the minimum time is 3 seconds:

New-BurntToastNotification -ExpirationTime (Get-Date).AddSeconds(3)