I think this has actually come up before (maybe in the fediverse), but unfortunately it isn’t possible to add in Plausible Analytics right now. You could technically include the JS as mentioned here, but the problem is the data-domain="rednosehacker.com" attribute – we don’t support that extra data right now.
Maybe this is a discussion you or we could start with the Plausible folks. Some possibilities could be fully integrating with them, or just supporting the JS attribute they need.