I have been fooling around with #crossposting and tooting & tweeting to test the SW.
You can #crosspost #𓅪𐃘𓃰 so that the test toots don't mess with other user's feeds by having the posts set to be direct messages to no-one on the Mastodon side. You get to see if it is working without bothering anyone.
If you are recently from the #TwitterMigration, as I am, it takes awhile to realize you are not shouting into the void here but in conference with others.
And ofc it is also good general #fediverse #etiquette to toot tweets as #unlisted toots rather than #public most of the time.
@mycologistmaybe
Perhaps this screen cap will help. It might look different if you are using an app.