I remember that when you set up a phone notification by calling a notify.<name_of_phone>
service there were some special options like you could write “TTS: foo” as the message to make it speak and you could somehow choose the alarm stream to ignore do-not-disturb mode, things like that.
I can’t find that any more. On Notifications - Home Assistant it just says:
data
: On platforms who have extended functionality. See your platform page if it is supported.
But unfortunately that isn’t a link and I have no idea where “my platform page” is.